The crude methanol extract of the seeds of Derris trifoliata showed potent and dose dependent larvicidal activity against the 2nd instar larvae of Aedes aegypti. From this extract two unusual rotenoid derivatives, a rotenoloid (named 7a-O-methyl-12a-hydroxydeguelol) and a spirohomooxarotenoid (named spiro-13-homo-13-oxaelliptone), were isolated and characterised. In addition a rare natural chro...

Background and objectives: Malaria is a remarkable cause of death in the world. Several ways are used by researchers to control or to decrease the detrimental effects of the disease, in which natural insecticides with less malaria vectors resistance and lower environmental damages are considered in last decades.The objective of this study was to assess the larvicidal activity of the whole flowe...

Synthetic chemicals are used to protect crops and agricultural products, thereby producing high yields. However, intensive use of these synthetic significantly affects the environment sustainable agriculture production. Moreover, direct or indirect exposure may cause acute chronic toxicity in humans animals. Due their biodegradability, low toxicity, being environmentally friendly, secondary met...

During speculation, Bacillus thuringiensis produces parasporal inclusions with insecticidal activity. The parasporal inclusions produced by most subspecies of B. thuringiensis are active only against the larvae of a few lepidopteran insects. Lepidopteran-active parasporal inclusions are usually bipyramidal crystals composed of one or more 130x lCP-l^Ox 10 Mr polypeptides. These polypeptides are...

The larvicidal effect of secondary metabolites Verticillum lecanii,Pencillium chrysogenum and Aspergillus niger against filaria vector Cx.quinquefasciatus was investigated. efficacies have been tested at four different concentrations mentioned fungi (25,50,75,100)ppm .larvicidal efficacy demonstrates that larval mortality related to concentration, exposure time age. Higher observed high moreove...

BACKGROUND AND OBJECTIVES Various plant-based products are safe and biodegradable alternatives to synthetic chemicals for use against mosquitoes. Oil of Pinus longifolia is traditionally used for protection against mosquitoes in some rural areas but there is no documented report of its use against mosquitoes. The present study was undertaken to scientifically evaluate the activity of Pine oil a...

Aedes aegypti (L.) is known as vector of dengue and chikungunya fever. Larvicides are used to control this vector. We evaluated the efficacy of newly developed formulations of larvicides to control Ae. aegypti under field conditions for 24 weeks post single application. Mosdop P and Mosdop TB containing diflubenzuron (2% and 40 mg/tablet, respectively) as the active ingredient, were applied at ...