In order to explore the relationship between structure and toxicity honey bees of seven-membered aza-bridged neonicotinoids, 16 novel neonicotinoid analogues are synthesized by replacing pyridine ring, changing substituents on electron-withdrawing group NO 2 imidazole ring our previously developed 1-[(6-chloropyridin-3-yl)methyl)]-10-(2,5-dimethylphenyl)-9-nitro-2,3,5,6,7,8-hexahydro-1 H-5,8-ep...

The bacterium Bacillus thuringiensis has been used as a microbial insecticide for half a century. However, limitations on its use against a pest such as Eldana saccharina Walker are that: a) B. thuringiensis is a soil-inhabiting organism and is therefore not persistent on plants, and b) the proteinaceous insecticide is degraded by sunlight when the bacterial cells lyse at the end of their life ...

Dengue is one of the major international public health concerns. Although progress is underway, developing a vaccine against the disease is challenging. Thus, the main approach to fight the disease is vector control. A model for the transmission of Dengue disease is presented. It consists of eight mutually exclusive compartments representing the human and vector dynamics. It also includes a con...

to determine the degree of susceptibility of an. sacharovi to malathion 5%, fenitrothion 1% and ddt 4% extended studies were carried out on sucked blood engorged mosquitoes collected from dasht argen (fars province) in 1997. testing method was according to standard who method in lots of 25 adults' mosquitoes in 4 replicates. an. sacharovi were touched by malathion 5% and ddt 4% insecticides in ...