ABSTRACT
Global changes play today an important role in altering patterns of human, animal, and plant host-pathogen interactions and invasive pest species. With rapid development in sequencing technology, there is also an increase in pathogen and pest studies adopting a macroscale, biogeographical perspective, and we present the most recent elements on existing ecological and biogeographical trends. We also compare the results on the one hand on emerging infectious diseases of animals and humans, and on the other hand on plant pathogens and pests. International exchanges of people, animals, and plant products currently contribute to their geographical extension but with notable differences across disease and pest systems, and regions. This review highlights that the subject of pathogens and plant pests, traditionally rooted in agronomic approaches, lacks work on macroecology and biogeography. We discuss the research orientations to better anticipate their ecological and economic impacts in order to better achieve environmental sustainability.
ABSTRACT
In the Republic of Kazakhstan melons and gourds are produced mainly in the traditional way, that is, by using chemical fertilizers and pesticides. The production of environmentally friendly melons is at the initial stage of its development. There is no organic melon growing at all. Considering the huge export potential of melons among other crops cultivated in the country (the total supply of melons and melons on the domestic market is 472%), the great economic and social significance of the transition of the melon industry to organic production is growing. In the future, Kazakhstan may be in the center of attention of the world community as a manufacturer and supplier of environmentally friendly (organic) melons, and environmentally friendly, natural melons may well become a brand of our sovereign state. To do this, it is necessary to make fundamental changes in the melon industry of the country. In general, the transition of agricultural production to an organic direction will contribute to the consumption of the safest and most useful products by the local population. Here, one should also take into account the decrease in the immunity of the human body due to various diseases, including those associated with the coronavirus pandemic. It should also be taken into account that only a limited number of pesticides used against harmful objects in agriculture act as intended, and most of the toxic substances spread into the environment. The use of disinfectants without scientific support has a negative impact on flora and fauna, being deposited in the soil and irrigation system of fields for a long time, thereby causing enormous damage to the environment. Given the above facts, our scientific research was aimed at the selection of pesticides and biological preparations with high biological and economic efficiency, low rates and frequency of treatments, as well as varieties with high resistance to fungal diseases of melons (watermelon, melon). Research work was carried out on the experimental plots of the Regional Branch "Kainar" of the LLP "Kazakh Research Institute of Horticulture" in the period 2020-2021. The studies used classical methods generally accepted in melon growing. The results obtained are new and relevant, and in the future, will contribute to the transition from traditional melon growing to biological.
ABSTRACT
It is reported that networks developed through the ACIAR Pacific Plant Biosecurity Partnership programme continue to help strengthen capacity in the prevention of the spread of pests and disease in crops throughout the Pacific region, despite COVID-19 disrupting the programme. Participants from 9 Pacific countries have developed their skills, networks and capacity to facilitate trade and prevent the spread of disease. Relationships and resources created through the programme continue to provide support for information-sharing around plant pests and diseases.
ABSTRACT
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
ABSTRACT
Net micro-Lab: micro-laboratories network for phytosanitary management of the horticultural crops. The Net micro-Lab project aims at setting up a network of remotely managed micro- laboratories in order to minimise the impact of vegetable plant diseases and to reduce the environmental impact through early diagnosis according to the following main objectives: constitution of a production chain, with particular regard to tomato cultivation, composed of Nurseries, Farms and Producer Organisations (POs);ex-ante analysis on tomato seeds coming from foreign countries;creation of micro-laboratories interconnected to an accredited central laboratory;design of specific, sensitive and rapid diagnostic tools based on isothermal amplification (LAMP) or real-time PCR technique;and finally, development of a mobile app for continuous data management by the accredited laboratory.
ABSTRACT
The I. E. Melhus Symposium is a prestigious event that takes place as part of the annual meeting of the American Phytopathology Society. The 19th symposium highlights some of the best and brightest graduate students in epidemiology on the theme Data Driven Plant Health. Because of the COVID-19 pandemic, the entire meeting was online. Despite the challenges, the awardees successfully presented their research to a live online audience of more than 150 attendees. The five research projects are collected in this issue of Plant Health Progress.
ABSTRACT
Originally, the 17th Symposium on Insect-Plant Relationships (SIP-17) was scheduled to take place in Leiden, The Netherlands, in July 2020. However, due to the COVID-19 pandemic, the symposium was postponed to July 2021 and held in an exclusively online format. This exceptional edition has resulted in four strong contributions to the journal. It is with great pleasure that we now present a themed issue including the proceedings of SIP-17, supplemented with eight regular articles within the subject of insect-plant relationships.
ABSTRACT
This paper provides information on the many similarities between plant and human viruses concerning their detection, spread and control methods, such as in Tobacco mosaic virus and COVID-19.
ABSTRACT
The Crawford Fund has supported a long-running program providing plant pathology and entomology support for smallholder farmers and provincial and district staff in southern Lao PDR. The program has involved over 32 volunteers, mentors and students covering 55 cash crops involved in poverty alleviation. The program has focused on identifying the key pests and diseases while working directly with the farmers to develop appropriate management practices. We endeavour to empower government advisers to work with farmers to alleviate poverty, for example through the production of high value horticulture crops. Activities have included workshops, establishment of small diagnostic laboratories, and the development of pest and disease checklists and extension materials. Benefits also flow to Australia, with volunteers and mentors gaining exposure to pests and diseases not present in Australia, and the opportunity to build professional networks. This case study describes the 'field to lab' approach that has characterised this program and made it successful. Dr Anderson visited Savannakhet and Champasak provinces in February and March 2019 as a volunteer with the Australian Volunteer Program. She worked with local government advisers to visit smallholder farmers and survey the leaf diseases that affect bananas in southern Lao PDR. In-field training for identification of banana leaf diseases was undertaken. Samples were taken to the laboratory for preliminary identification, providing the opportunity for training in specific techniques for working with banana leaf pathogens. Samples were sent to colleagues in internationally recognised laboratories for formal identification, making use of specialised resources not present in Lao PDR. During COVID, ongoing support for the identification of pest and diseases and their management has been through the use of social media such as WhatsApp which link the network of past volunteers, mentors and Lao counterparts.
ABSTRACT
The global COVID pandemic has impacted the world in ways and at a scale that few could have predicted, with many industries severely disrupted. Despite this, crops were sown and harvested, food was produced and agriculture continued to function, albeit it with many logistical challenges. Plant health lies at the heart of preventing crop losses through a combination of varietal resistance and agronomic practices. In the case of foliar plant diseases in wheat, varietal resistance plays a key role, but the use of synthetic fungicides is essential to minimize crop losses. European arable production faces a dilemma: how to contribute and maintain global food supplies but at the same time decrease emissions of greenhouse gases (GHGs), reduce inputs potentially harmful to biodiversity, society and the environment while ensuring no more land is brought into production. Throughout history, major disruptions in society have led to big steps in agricultural innovation. Presently, the major disruptive forces in Europe are not just a result of the COVID pandemic but the increasingly urgent need to address climate change. Within the European Green Deal, the Farm-to-Fork strategy is in place to help achieve climate neutrality by 2050, aiming for a reduction of GHG emissions of 55% by 2030. To achieve this, there will need to be a major adjustment to how food is produced, a realignment in plant health strategies and accelerated innovation across the agricultural sector. This paper aims to evaluate how synthetic fungicides presently contribute to plant health (mainly wheat) and food production as well as the management of GHG emissions. In addition, it explores the future challenges and prospects for their positive contribution in achieving global food security alongside emerging innovative technologies.