No resistance and pollution free insecticide: I-laboratory investigation

In order to avoid pollution and the development of insect resistant strains a simple physical method is described using froth of soap to obstruct insect ventilation

House fly control by Damsissa and chemical fertilizers

This work aimed to study the effect of Damsissa plant and some chemical fertilizers on house fly breeding. The results showed that the plant has a good lethal effect on larval stages of house fly and it was not a repellent for adult stage. Also chemical fertilizers such as urea, potassium phosphate and triple phosphate were lethal to the larval stage, besides they were repellent to the adults. We concluded from these results that the chemical fertilizers cannot be used in fly control for its repellent action and consequently house fly can lay eggs on other places so do not affect its breeding activity. While the Damsissa was not repellent for flies and moreover the egg laid on it do not complete its life cycle

Lanistes carinatus: for biological control of biomphalaria Alexandria snails I laboratory observations

This work was designed to study the role of ampullarid snail, Lanistes carinatus as biological control of Biomphalaria alexandrina. The obtained results showed that L.carinatus snail has a voracious appetite for B.alexandrina egg masses even in the presence of green aquatic vegetation. The survival rate of adult B.alexandrina snails and their egg masses production significantly decrease with the increase of L.carinatus snails

Effects of praziquantel [biltricide] on healthy miceI- Haematological study

In order to detect the possible adverse effects of praziquantel, 40 healthy mice were used in the experiment. Each one was given the drug at a dose of 40 mg per kg body weight orally by stomach tube. Hematological investigations as determination of hemoglobin concentration, hematocrit percent and total erythrocytic count were done at intervals of 24 hours after drug administration, 72 hours an at the end of each week for 6 weeks. Five mice were used as a comparative control group. The results obtained revealed that the host developed macrocytic hypochromic type of anemia with transient polycythemia at the end of 1s week then developed macrocytic hypochromic anemia from the end of 2nd week onwards

Effects of praziquantel [biltricide] on healthy mice: II- Hepatobiochemical and hepato-renal histopathological studies

This work was designed in order to study the effect of praziquantel on some hepatobiochemical and hepatorenal histopathological changes of healthy mice treated with a single oral dose of 40 mg per kgm body weight. Forty mice were used in the experiment as a study group. Five of the treated mice and five controls were killed at different time intervals 24, 72 hours and then weekly for a period of 6 weeks. The obtained results revealed that significant changes of hepatoenzymes viz glutamic pyruvic transaminase [GPT], Alkaline phosphatase and acid phosphatase were appeared. Hepatolipogram was affected significantly. Not only that but hepatoelectrolytes were also interrupted during the period of experiment. On the other hand, no histopathological changes were detected in the liver and kidney tissues of the treated group as compared with the control

extended molluscicidal effect of ambrosia maritima [damsissa] in the field

With the aim of studying the extended molluscicidal effect of Ambrosia maritima [damsissa] in the field, a snail survey was made on the chosen experimental canal at Abbis II village, Alexandria Governorate. A treatment with dry damsissa plant was used in conc. 75 ppm. The plant has proved to be able to control the snail vectors of bilharziasis, Biomphalaria alexandrina and Bulinus truncatus and their eggs for quite a long extended time at a very low concentration. Also it does not cause stream pollution or kill non target organisms

lethal effect of ambrosia maritima [damsissa] on bulinus deccarii from Gizan, Saudi Arabia

Lab. Experimentations were carried out to determine the effect of Ambrosia maritima [damsissa] on Bulinus beccarii, the vector of Schistosoma hematobium in Saudi Arabia. A concentration of 1000 ppm, w/v was found to have a quite lethal effect on Bulinus beccarii snails in the laboratory

Laboratory trials of the molluscicidal action of euphorbia peplus L [euphorbiaceae]

Euphorbia peplus is a wild herb commonly found all over Egypt. It was investigated in the laboratory in fresh green and dry form, for its action on Biomphalaria alexandrina snails. Trial with different concentration of the herb showed that the lethal dose within one day exposure varied from 1500 ppm in green state to 600 ppm in dry state. It was observed that the percent of mortality was directly related to its concentration. Also, the need for prolonged exposure at low concentration was detected. E. peplus potency was maintained for more than 6 days. The results show that the effect of the herb on the small fish is nearly the same as on snails

Treatment of schistosomiasis by biological products cyanogenic glycosides

The CN group from biological sources is investigated for its therapeutic value. Plants containing cyanogenic glycosides were used to treat mice infected with S.mansoni. The seeds of two plants from the local flora were used viz: Linum usitatissimum Fam Linaceae and Raphanus sativus Fam. Cruciferae. Human cases of S.haematobium and cases of S. mansoni were successfully treated by these seeds administered orally

effect of heat, cold and aging time on the viability of encysted trichinella larvae

35 cuts of various sizes of heavily infected trichinous pork and whole carcass of a trichinous pig were used to study the effect of slow and quick freezing at -10°C, -20°C, -30°C, -35°C, 38°C and -40°C and the effect of dry and moist heat at 45, 50, 55°C on the viability of encysted larvae and aging as well. The results obtained indicated that the time required to kill the larvae in cuts of trichinous pork is such shorter in quick freezing than slow freezing. By slow freezing at -25°C the time required to kill the larvae in cuts weighing 5 kg was 108 hours, while by quick freezing was 48 hours. Experiments conducted on the effect of heat upon the encysted larvae proved that exposure of cuts weighing 2, 3.5 and 5 kg. to 55°C needs 15, 17, 18 hours respectively by using dry heat, while with moist heat, this time is respectively 40, 41, 48 minutes. As regards the effect of aging on encysted larvae, the present study shows that they were no longer alive in decomposed meat on day 56

Biological combat of schistosomiasis: ambrosia maritima [Damsissa] for snail control

Ambrosia maritima [Damsissa] as a biological means of control of Bilharzia snails has been successfully tried in the field when, applied green, dry and also by growing along infested canals. The method is quite easy, safe and inexpensive. The plant has proved to be able to control snails in the field for quite a long time and at a very low concentration. Also it does not cause stream pollution or kills nontarget organisms