The parasitic mite, Varroa destructor is one of the most important pests attacking apiaries all over the world. The aim of work is to evaluate the effects of fresh garlic, onion, mix of them, garlic oil and onion oil against Varroa mite in the honey bee colonies in Sohag Governorate. Data revealed that, all tested materials were effective when compared with control. The treatment with fresh garlic led to the highest percentage of fallen Varroa mite with 94.29% of the total Varroa presented in the bee colony, followed insignificantly by the mixture of garlic and onion (93.60%), garlic oil (91.55%) and onion oil (89.91%), however, the lowest percentage was recorded in fresh onion treatment with 85.33% of the total Varroa presented in the bee hive. Also, it is clear that the highest reduction percentage was recorded after the first application in all materials, the number of applications needed to satisfactory Varroa control differed depending on material type.
The present study was carried out in the laboratory to investigate the repellent and toxic effects of faba bean seed treatment by camphor, mint, and basil oils on Aphis craccivora, and also, the effect of using dry and sprouting seeds was investigated. Data indicated that using sprouting seeds increased the repellent and toxic effects of oils compared with using dry seeds. After 1 hour, the highest repellent effect was recorded on sprouting seed treatment with basil oil (73.68%), followed insignificantly by dry seed treatment with basil oil (71.43%), sprouting seed treatment with mint oil (70.00%), and sprouting seed treatment with camphor oil (67.74%). However, after 24 hours, sprouting seed treatment with mint oil recorded the highest repellent effect (76.74%), followed insignificantly by dry seed treatment with basil oil (75.61%), sprouting seed treatment with basil oil (75.61%), and sprouting seed treatment with camphor oil (70.00%). No mortality percentages were observed by 1 day from treatment. After 2 days, the mortality percentage was almost low to moderate, however, a sharp increase was observed after 3 days, then mortality slightly increased after the fourth and fifth days in all treatments. Sprouting seed treatment with basil oil was the most effective against the adults of A. craccivora with mean mortality of 63.74%, followed insignificantly by sprouting seed treatment with camphor oil (63.02%) and with mint oil (61.36%).
The present work was conducted in the laboratory of Plant protection, Shandweel Agricultural Research Station, Sohag Governorate to investigate the effect of priming of faba bean seeds with three concentrations, 50, 100 and 200ppm for each substances of salicylic acid, acetyl salicylic acid and methyl salicylate on survival, duration and wing formation of the cowpea aphid, Aphis craccivora Koch., also, their repellent effect was determined. Results obtained showed that the highest effect was recorded in salicylic acid at 200ppm (86.96%) after 24 hours, however, no repellent effects were recorded from acetylsalicylic acid. Priming faba bean seeds with salicylic acid and methyl salicylate elongated the nymphal stage, decreased their survival and increased wing formation compared to control. The effects of the three substances were found to be concentrated dependant. The use of salicylic acid and methyl salicylate as resistance inducers hold great promise for application for A. craccivora control as eco-friendly method.
pomegranate butterfly, Deudorix livia is a dangerous pest that attacks pomegranate orchards in Egypt, causing severe damage and a great loss in yield. The seasonal population dynamics of pomegranate butterfly were investigated on five pomegranate varieties (Wonderfull, Manfaloty, Araby, Nab Al-Jaml, and Wardy) in this study during the seasons of 2021 and 2022 at Sohag Governorate. Results indicated that D. livia started to appear in pomegranate orchards in late May and continued to the early part of October in the five tested varieties in both seasons. Eggs, entrance holes, and emergence holes of the pest showed 4, 3, and 3 peaks of numbers, respectively, in both seasons of the study. The lowest numbers of eggs and entrance holes were observed during May, while the highest numbers were recorded during September and October, in both seasons. For emergence holes, the lowest and highest numbers were observed during June and September, in both seasons. The five pomegranate varieties varied significantly with regard to the number of eggs, entrance holes, and emergence holes in the two seasons. All tested pomegranate cultivars showed varied susceptibility degrees against D. livia. Manfaloty and Wonderful recorded the highest and the lowest attractive variety for infestation by the pest during the two seasons of study.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.