An inaugural survey of cereal, oilseed and vegetable crop diseases in the Yukon Territory in 2020

Various kinds of field crops growing on two commercial farms in the Whitehorse area of the southern Yukon Territory were surveyed for diseases in summer 2020 by staff of the Agriculture Branch of the Government of Yukon. They included barley, wheat, canola, beets, broccoli, cabbage, carrots, potatoes and turnips. Fields were visited one or more times during July and August. The incidence and severity of diseases were visually assessed on a crop-by-crop basis and samples were collected for laboratory analysis of the pathogens present, if any. Both infectious and non-infectious diseases were present on most crops. The infectious diseases were caused by various species of plant pathogenic bacteria and fungi that were common on these crops growing in other areas of Canada. INTRODUCTION AND METHODS: The 2020 field crop disease survey is believed to be the first organized study of its kind on agricultural crops in the Territory. In his book, "An Annotated Index of Plant Diseases in Canada . . . ", I.L. Conners lists over 300 records of plant diseases on trees, shrubs, herbs and grasses in the Yukon that were published by individuals who were surveying forests and native vegetation mainly for federal government departments, universities and other agencies (Conners 1967). The objectives of the 2020 survey were: (1) to determine the kinds and levels of diseases on selected Yukon crops, (2) to identify the major pathogen species attacking Yukon crops, and (3) to use the results to plan future surveillance activities aimed at helping producers to improve their current disease management programs. All of the fields included in the 2020 survey were situated on two commercial farms, which were designated as Farm #1 and #2, in the Whitehorse area in the southern Yukon (Fig. 1). The crops surveyed included cereals (barley and wheat), oilseeds (canola) and vegetables (beets, broccoli, cabbage, carrots, potatoes and turnips). Fields were visited one or more times in the mid- to late growing season (July/August) at a time when damage from diseases was most noticeable. Symptoms were visually assessed on a crop-by-crop basis by determining their incidence and severity. Incidence was represented by the percentage of plants, leaves, heads, kernels, etc., damaged in the target crop, while severity was estimated to be the proportion of the leaf, fruit, head, root/canopy area, etc., affected by a specific disease as follows: Proportion of the canopy affected based on a 0-4 rating scale, where: 0 = no disease symptoms, 1 = 1-10% of the crop canopy showing symptoms;2 = 11-25% showing symptoms, 3 = 26- 50% showing symptoms, and 4 = > 50% showing symptoms. Photographs of affected plants were taken and sent to plant pathologists across Western Canada for their opinions on causation. Where possible, representative samples of plants with disease symptoms were packaged and sent to the Alberta Plant Health Lab (APHL) in Edmonton, AB for diagnostic analyses. Background information, such as the general cultural practices and cropping history, was obtained from the producers wherever possible. GPS coordinates were obtained for each field to enable future mapping Cereals: Individual fields of barley (11 ha) and wheat (30 ha) located at Farm #1 were surveyed. The barley was a two-row forage cultivar 'CDC Maverick', while the wheat was an unspecified cultivar of Canada Prairie Spring (CPS) Wheat. Plant samples were taken along a W-shaped transect for a total of five sampling points for the barley field (< 20 ha) and ten sampling points for the wheat field (> 20 ha). The first visit, which occurred on July 30, involved visual inspection and destructive sampling wherein plants were collected and removed from the field for a detailed disease assessment at a lab space in Whitehorse. There, the roots were rinsed off and the plants were examined for disease symptoms. The second visit to these fields, which occurred on August 27, only involved visual examination of the standing crop. Oilseeds: A single 40 ha field of Polish canola (cv. 'Synergy') was examined o

Survivability and Benefit Evaluation of Streptomyces sp. and Trichoderma sp. as Active Ingredients of Biopesticides and Soil Fertility Enhancer in Shallot Fields at Wates Village Tulungagung

The purpose of research on the Farmer Empowerment Program in Wates Village is to increase knowledge in the field of sustainable agriculture and transfer of technology for the application of biopesticides containing the Biological Control Agent (APH) Streptomyces sp., Trichoderma sp. combined with shallot cultivation technology in the village of Wates Tulungagung. Innovative methods and Participatory Action Research (PAR) are used to encourage transformative action, by involving community members as PAR implementers in describing the types of plants being treated and applying them during the Covid-19 pandemic in the Wates village, Tulungagung District. The results of the evaluation and monitoring of the use of APH as a biopesticide and fungicide to control moler disease caused a decrease in the population of microorganisms, the population of Trichoderma sp. was absent (o) but Streptomyces sp. increase. Giving APH proved that microorganisms act as decomposers that increase the availability of N and P nutrients through their ability to accelerate the decomposition of organic matter given at the beginning of planting. The K nutrient content in the soil before and after treatment did not differ.

2021 The 6th International Conference of Indonesia Forestry Researchers - Stream 1 Emerging Environmental Quality for Better Living, Tangerang, Indonesia (Virtual), 8 September 2021

These proceedings contain 18 papers presenting and discussing the current environmental issues in Indonesia including monitoring of environmental pollution, role of environmental laboratory and set up national standard of environmental monitoring;circular economy and environmental quality management by businesses and relevant activities;mercury pollution, progress of National Action Plan for mercury reduction and elimination as a part of the ratification of Minamata Convention on Mercury;medical wastes and disposal concerning Covid-19 pandemic and antibiotically resistance;domestic waste, hazardous and poisonous materials and wastes;restoration and remediation of contaminated lands;and freshwater litters.

Differential responses of soil nitrogen‐oxide emissions to organic substitution for synthetic fertilizer and biochar amendment in a subtropical tea plantation

Tropical and subtropical acidic soils have been well documented as hotspots of global soil nitrogen (N) oxide (i.e., nitrous oxide (N2O) and nitric oxide (NO) emissions). While the effectiveness of possible mitigation options has been extensively examined in croplands, little is known about their effectiveness in reducing N‐oxide emissions from acidic soils of rapidly expanding tea plantations in China. Here, we conducted a 2‐year field experiment to investigate how organic substitution for synthetic fertilizer and biochar amendment affect soil N‐oxide emissions from a subtropical tea plantation. Across the 2‐year measurement period, full organic substitution for synthetic fertilizer significantly increased N2O emissions by an average of 17% while had a lower NO emission compared to synthetic fertilizer alone. Our global meta‐analysis further revealed that full or partial organic fertilizer substitution resulted in a 29% (95% confidence interval: 5%–60%) increase of N2O emissions from acidic soils. In contrast, irrespective of fertilizer type, biochar amendment significantly reduced N2O emissions by 14% in the first but not second experimental year, suggesting a transient effect. The trade‐off effect of full organic substitution on N2O and NO emissions may be attributed to the favorable conditions for N2O production due to the stimulated activity of nitrifiers and denitrifiers. The suppression of N2O emission following biochar amendment was probably due to promoted further reduction of N2O to dinitrogen. The fertilizer‐induced emission factor (EF) of N2O (2.1%) in the tea plantation was greater than the current IPCC default value, but the EF of NO (0.8%) was comparable to the global estimate. Taken together, while biochar amendment could have mitigation potential, cautions are needed when applying organic substitution for synthetic fertilizer as mitigation options for acidic soils as hotspots of N‐oxide emissions.

Potato (Solanum tuberosum L.) Growth and Quality as Influenced by Inorganic Fertilizer Rates in Northwestern Ethiopia

Potato (Solanum tuberosum L.) is an important tuber crop that is highly affected by poor soil fertility and nutrient disparities. Nutrient depletion due to intensive monocropping and poor soil management practices is a serious problem in Ethiopia, including in northwestern areas. Therefore, an experiment was conducted in the East Gojjam zone of northwestern Ethiopia to evaluate the influence of phosphorus and potassium fertilizer rates on potato tuber production. Three phosphorus levels (0, 34.5, and 69 kg/ha−1) and four potassium levels (0, 100, 200, and 300 kg/ha−1) were set out in a factorial arrangement and replicated three times using a randomized complete block design. Data on growth and quality parameters, as well as plant tissue analysis results, were collected. According to the results, the main effects of phosphorus and potassium fertilizer rates statistically affected growth components. The combined effects of phosphorus and potassium fertilizers had a significant influence on quality components (tuber size distribution). Similarly, the interaction effects of phosphorus and potassium fertilizer rates gave the highest response in all nutrient use efficiency parameters. The combined application of 34.5 kg P2O5 and 200 kg K2O fertilizers resulted in the highest medium (28.32 ton/ha−1) and large-sized (20.0 ton/ha−1) tuber yields. The interaction effect of 34.5 kg P2O5 with 100 kg K2O ha−1 yielded the highest agronomic and recovery efficiency values. Hence, a combination of 34.5 kg P2O5 ha−1 and 200 kg K2O ha−1 fertilizer rates can be recommended for the optimal production of potato in the northwestern area.

The impact of land certification on cropland abandonment: evidence from rural China

Purpose>This study explores how the land tenure system helps in protecting land quantity during agricultural production by estimating the influence of land certification on cropland abandonment, its mechanisms and its heterogeneous effects among groups at the provincial, community and household levels.Design/methodology/approach>To deal with potential homogeneity concerns, the authors investigate the impact of land certification on the area of abandoned croplands using nationally representative panel data from the 2017 and 2019 China Rural Household Panel Survey on 15,000 households across 29 provinces and time-varying difference-in-differences and propensity score matching-difference-in-differences models.Findings>Land certification significantly contributes to the protection of land quantity during agricultural production, and it reduces the area of abandoned croplands by at least 4%. This effect is mainly achieved by improving soil fertility, promoting land transfer, increasing the availability of agricultural subsidies and raising agricultural income. However, while land certification benefits farmers in nonmajor grain-producing areas and western regions, in plain, remote and nonpolitically central villages, and farmers who have not undergone land transfer or land adjustment, it is not beneficial for others.Research limitations/implications>In the postepidemic era, food security based on the protection of the amount of cultivated land becomes increasingly important. It is realistic and inevitable to rationally use every inch of cultivated land and curb the cropland abandonment by strengthening land tenure system reform, especially in the case of the insecurity of land tenure.Practical implications>There are various factors affecting farmers' cropland abandonment, such as poor soil fertility, unavailable land transfer, too little agricultural subsidies and too low agricultural income, but the root cause is the insecurity of land tenure. Empirical evidence from rural China has shown that a clear definition and effective protection of property rights can help curb the cropland abandonment. Enhancing the land protection behavior of farmers through the reform of land certification and promoting the sustainable use of land are what the reform of land tenure system should be.Social implications>Cultivated land, as the material carrier and endowment basis of grain production, is of great importance to safeguarding national food security, especially in the postepidemic era. At the present stage, it is still necessary for most developing countries to strengthen the construction of land tenure system, to carry out land certification reform and to issue farmers with clearly defined and legally effective land certificates. Equally important, efforts also should be made to promote the diversified utilization of the achievements of the certification after the completion of land certification reform in China and other developing countries.Originality/value>Expropriation and occupation of croplands are essential in protecting land quantity during rapid urbanization, and so is reducing cropland abandonment during agricultural production;therefore, it deserves close attention. In this regard, this study estimates the impact of land certification on the area of abandoned croplands, examines its possible mechanisms and identifies its heterogeneous effects to test the applicability of the property rights theory in the Chinese context and enrich the relevant literature and provide Chinese evidence for other developing countries to strengthen the protection of land quantity, by deepening the reform of the land tenure system under different circumstances.

Infestation of pest of pulses legume grains Callosobruchus spp and substantial loss of dietary vegan protein

The current study is the reviews of the work done for pest infestation in different legume pulse grains Pulse grains have been found to have different susceptibility for the attack of pulse beetle. An insect has varied fecundity on different varieties of pulses. India is agriculture based country and agriculture is the key sector of Indian economy. Including many kharif and rabbi crops, pulses are cultivated in all parts of country. Pulse cultivation has its own significant place in agriculture as it has been considered as complimentary to cereal crop in many aspects and positioned as a second most important crop plant [1]. Study indicates 20-40% of dry matter of pulse grains is made up of beneficial dietary proteins [2]. Insufficiency of adequate amount of protein in diet may lead to protein energy malnutrition. Like poverty and hunger, to combat PEM is another great provocation for agriculture and nation. Pulse grains legumes are good source of protein and other nutrient materials. Crop plant of Arhar has its own advantage for agriculture. The leguminous plants are used in crop rotation to improve the fertility of soil as the root nodules harbor the nitrogen fixing bacteria;fixes atmospheric nitrogen to nitrogen compound about 72-350 kg/hectare/year . The current study emphasizes the different facts of pulse beetle and their infestation in arhar seed grains. About eight months of the year have been found to be susceptible for infestation;remarkable growth and development of pests continue during six months of the year. Arhar pulse grains are most suitable for pest infestation. Bold variety of arhar was identified to be the most preferred for maximum oviposition having larger and smooth surface area. Temperature suitable for oviposition was noticed between 28-370c. Developmental period was found to be of lesser duration and survival of adults was more in bold varieties as compared to the smaller variety. Developmental period was recorded as 24-30.3 days in bold legume grains and 26-32.3 days in smaller size grains. Survival of male and female insect pest was also different as male survived for 7-10.6 days and females for 8.3-12.6 days. Increased growth rate of insect population was there with the increase in temperature and humidity. Significant Weight loss, content loss and percent germination loss have been found in the pulse grains of both varieties in the current studies. Indian economy relies significantly on agriculture and loss and damage of complementary crop plant certainly affect it. At this point there is need to consider the condition of Mass poverty of India after pandemic covid -19 which has been ascertained after more than 45 years The outcome of pandemic recession is more than 2 fold increase in the number of poor from 60 million in a year to 134 million (Reports of downtoearth.org.in). Furthermore any rise in price would snatch the accessibility of the easily available protein diet from people living in indigence.

The First Optimization Process from Cultivation to Flavonoid-Rich Extract from Moringa oleifera Lam. Leaves in Brazil

Flavonoids are significant antioxidant and anti-inflammatory agents and have multiple potential health applications. Moringa oleifera is globally recognized for its nutritional and pharmacological properties, correlated to the high flavonoid content in its leaves. However, the bioactive compounds found in plants may vary according to the cultivation, origin, season, and extraction process used, making it difficult to extract reliable raw material. Hence, this study aimed to standardize the best cultivation and harvest season in Brazil and the best extraction process conditions to obtain a flavonoid-rich extract from M. oleifera as a final product. Firstly, ultrasound-assisted extraction (UAE) was optimized to reach the highest flavonoid content by three-level factorial planning and response surface methodology (RSM). The optimal cultivation condition was mineral soil fertilizer in the drought season, and the optimized extraction was with 80% ethanol and 13.4 min of extraction time. The flavonoid-rich extract was safe and significantly decreased reactive oxygen species (ROS) and nitric oxide (NO) in LPS-treated RAW 264.7 cells. Lastly, the major flavonoids characterized by HPLC-ESI-QTRAP-MS/MS were compounds derived from apigenin, quercetin, and kaempferol glycosides. The results confirmed that it was possible to standardize the flavonoid-rich extract leading to a standardized and reliable raw material extracted from M. oleifera leaves.

Effect of agroforestry on community wellbeing in Kyannamukaaka Sub County, Masaka

Community wellbeing is dependent on agroforestry, which provides social, economic, health and ecological benefits for man, and has proved essential in the COVID-19 pandemic. The paper purposely examines the effect of agroforestry on community wellbeing with a focus on the benefits of tree-crop interactions on community's wellbeing, and limitations to adoption of tree-crop interactions in Kyanamukaaka Sub County. The paper employs a cross-sectional survey design using qualitative data collection approaches. The paper targets 35 farmers from which 32 practicing in tree-crop interactions were determined by Krejcie and Morgan sample size determination table. Respondents were purposely selected and participated in the study. Data was collected through interview, observation and documentary review. Later, it was organized, transcribed and triangulated to develop themes for interpretation, analysis and discussion. Results indicate that tree-crop interactions offer socioeconomic [food (96.9%), local herbs (100%), fodder (52.6%), raw material (62.5%), firewood and income (90.6%), employment (37.5%) and ecological (conserves soil fertility and moisture conservation (50%)), controls soil erosion runoff (59.4%), protect soil health (28.1%) and act as habitats organisms (34.4%)] benefits. Furthermore, other themes included;climate change (84.4%), land size and ownership (90.6%), inadequate competences (50%) anthropocentrism (56.2%), poor quality and high costs of farm inputs (96.9%) and diseases (93.7%) as limitations to adoption of tree-crop interactions. The paper concludes that tree-crop interactions were of benefit to the community. However, observations show that some households had no trees while the others cut trees unsustainably on their farmlands. Therefore, to increase adoption of tree-crop interactions and diversity, Kyannamukaaka Sub County and Masaka District should create awareness and build farmers' capacity in climate change resilience, underground forestry management, tree growing and energy efficient technologies.

Microbial diversity and the abundance of keystone species drive the response of soil multifunctionality to organic substitution and biochar amendment in a tea plantation

High nitrogen (N) fertilizer inputs accelerate soil acidification and degradation in tea plantations, thus posing a threat to soil microbial diversity, species composition, and ecosystem service functions. The effects of organic fertilizer and biochar applications on improving soil fertility have been extensively studied on cropland;however, little is known about their effectiveness in promoting soil multifunctionality on rapidly expanding acidic soils in tea plantations. In this study, we conducted a two‐year field experiment in a subtropical tea plantation to investigate the effects of organic fertilizer substitution and biochar amendment on soil microbial communities and multifunctionality. The results showed that soil multifunctionality was enhanced in plots amended with organic fertilizer and biochar. Soil multifunctionality was significantly and positively correlated with alpha‐diversity of bacteria but not fungi. We also found that organic fertilizer substitution and biochar amendment improved soil multifunctionality by altering the abundance of keystone species. The abundance of keystone species classified as module hubs in the bacterial co‐occurrence network contributed significantly and positively to soil multifunctionality. In contrast, the keystone species categorized as module hubs in the fungal co‐occurrence network negatively affected soil multifunctionality. Soil pH was a key driver of soil microbial community composition, indicating that the increase in soil pH under organic fertilizer and biochar amendment had a crucial role in biological processes. These results suggest that organic substitution and biochar amendment are beneficial in preventing soil degradation and maintaining soil multifunctionality in subtropical tea plantations.

Overwintering and Yield Responses of Two Late-Summer Seeded Alfalfa Cultivars to Phosphate Supply

Phosphorus (P) is one of the essential nutrients for alfalfa (Medicago sativa L.) growth, but P deficiency in soil is a common phenomenon. Applying an appropriate amount of P fertilizer for alfalfa in the establishment year improves winter survival, helps achieve sustainable high yields, and promotes the best economic returns. The objective of this study was to determine the effect of different P fertilization rates (0, 22, 44, and 66 kg P ha−1) on winter survival, forage yield, and root traits of two late-summer seeded alfalfa cultivars (dormant and semi-dormant) in the establishment and first production year. Our results showed that applying an appropriate amount of P fertilizer can increase forage yield and enhance the persistence of late-summer seeded alfalfa by promoting the development of crown and root traits and improving winter survival, especially for semi-dormant cultivars. Late-summer seeding and application of appropriate P fertilizer rates are effective agronomic methods for alfalfa in cold and arid winter regions, and can be used as strategies to improve fertility and stabilize soil from wind erosion for sustainable agriculture. To obtain high rate of survival in winter, the optimal P fertilization rates for the dormant and semi-dormant alfalfa cultivars in this study were 31.4 and 41.3 kg P ha−1, whereas the optimum P application rates for high forage yields were 31.3 and 31.5 kg P ha−1, respectively.

Recovery of Degraded Areas through Technosols and Mineral Nanoparticles: A Review

Anthropogenic sources such as urban and agricultural runoff, fossil fuel combustion, domestic and industrial wastewater effluents, and atmospheric deposition generate large volumes of nutrient-rich organic and inorganic waste. In their original state under subsurface conditions, they can be inert and thermodynamically stable, although when some of their components are exposed to surface conditions, they undergo great physicochemical and mineralogical transformations, thereby mobilizing their constituents, which often end up contaminating the environment. These residues can be used in the production of technosols as agricultural inputs and the recovery of degraded areas. Technosol is defined as artificial soil made from organic and inorganic waste, capable of performing environmental and productive functions in a similar way to natural ones. This study presents results of international research on the use of technosol to increase soil fertility levels and recover degraded areas in some countries. The conclusions of the various studies served to expand the field of applicability of this line of research on technosols in contaminated spaces. The review indicated very promising results that support the sustainability of our ecosystem, and the improvement achieved with this procedure in soils is comparable to the hybridization and selection of plants that agriculture has performed for centuries to obtain better harvests. Thus, the use of a technosol presupposes a much faster recovery without the need for any other type of intervention.