bacillus thuringiensis (bt) is the most important microbial agent for biological control of insect pests of agricultural crops and forest plant. effective control of these pests mostly relies on finding and practical application of native bt isolates. in this study, 160 soil samples belong to various ecological area of mazandaran province (forest, orchard, urban, agricultural and non-vegetative...

Brent D. Ryan first visited Detroit in 1993. Describing this experience, he says: ‘‘The sense of emptiness was overpowering. ... I felt as if I was walking into the ruin of America.’’ In his book ‘‘Design after decline—how America rebuilds shrinking cities,’’ Ryan tries to understand why so many American cities have been losing population, what was and is done to change the fortune of these cit...

Cotton has lost many ancestral defensive traits against key invertebrate pests. This is suggested by the levels of resistance to some pests found in wild cotton genotypes as well as in cultivated landraces and is a result of domestication and a long history of targeted breeding for yield and fiber quality, along with the capacity to control pests with pesticides. Genetic modification (GM) allow...

The species Gonatopus vidanoi Olmi, 1994 and Haplogonatopus hernandezae 1984 (Hymenoptera: Dryinidae) are recorded for the first time from urban parks of Bogotá city (Colombia). In addition, is in Colombia. These new records contribute to a better knowledge diversity parasitoid wasps present Colombia, context their trophic role as natural enemies leafhoppers (Hemiptera: Auchenorrhyncha) recogni...