ba ckground: mosquitoes are well known as vectors of several disease causing pathogens. the extensive use of synthetic insecticides in the mosquito control strategies resulted to the development of pesticide resistance and fos- tered environmental deterioration. hence in recent years plants become alternative source of mosquito control agents. the present study assessed the larvicidal and ovipo...

Melon is one of the most exported fruits from Brazil. The leafminer fly, Liriomyza sativae (Blanchard) (Diptera: Agromyzidae), major problems that negatively interfere in productivity increase this crop. Chemical control adopted method for pest; however, producers have reported reduced susceptibility to insecticides. Thus, study aimed evaluate L. larvae abamectin, cyromazine, and cyantranilipro...

Bombus terrestris bumblebees are important pollinators of wild flowers, and in modern agriculture they are used to guarantee pollination of vegetables and fruits. In the field it is likely that worker bees are exposed to pesticides during foraging. To date, several tests exist to assess lethal and sublethal side-effects of pesticides on bee survival, growth/development and reproduction. Within ...

Cabbage aphid, Brevicornye brassicae (Linnaeus) is one of the major insect pests cabbage. Chemical control mostly used to manage this pest. The present investigation was conducted evaluate an environmentally benign approach for pest management through different entomopathogenic mycoformulations against nymphs B. identify effective mycoformulation. effect supplemented with adjuvants Brassicae al...

Bioassays are widely used to estimate ecological risks of contaminated sediments. We compared the results of three whole sediment bioassays, using the midge larva Chironomus riparius, the water louse Asellus aquaticus, and the mayfly nymph Ephoron virgo. We used sediments from sixteen locations in the Dutch Rhine-Meuse Delta that differed in level of contamination. Previously developed protocol...

The usually accepted mothods for bioassay of histamine according to Schild el at. (1951), employ (i) eat's blood pressure, (ii) guinea pig's uterus or (iii) the guinea pig's ileum. Code (1952) has reported that the most convenient tissue for the bioassay of histamine is guinea pig's terminal portion of the ileum and on this account it is the most widely employed pharmacological preparation for ...