the search for alternative ways of controlling sericultural pests has led to the investigation of plant sources for naturally occurring compounds which may have insect growth regulatory, feeding deterrency, repellency and confusantcy characteristics. more than 2000 species of the families asteraceae, fabaceae and euphorbiaceae are known that possess some insecticidal activity. plants with insec...

Blackbirds cause extensive damage to newly planted and ripening rice. To date there is not a registered bird repellent for reducing this damage. We evaluated Flight ControlK, a 50' anthraquinone product, as a potential repellent to blackbirds in cagc and field tests in Louisiana. In oneand no-choice cage tests, brown-headed cowbird and red-winged blackbird consumption of 2%) Flight controlR tre...

Plants use many means to attract pollinators, including visual cues and odor. We investigated how nonpigment floral chemistry influences nectar removal, floral visitation, florivory, rates of outcrossing, and fitness through both male and female functions. We blocked expression of biosynthetic genes of the dominant floral attractant [benzyl acetone (Nachal1)] and nectar repellent [nicotine (Nap...

Repellents include chemical substances, visual displays, and sonic and ultrasonic deterrent systems. The use of electric shock also can be considered as a repellent category. Each of these categories is discussed, together with their respective utilities, constraints on their usefulness, and possibilities for future development. Economic considerations that may impede or expedite the developmen...

Three flavonoidal aglycones viz; F1 (Chrysin), F2 (Kampferol) and novel F3( 3,7dimethylether quercetin), were isolated from acetone wash of fresh leaves of Datura stramomium L. Isolated compounds were identified on the basis of their physico-chemical properties, Co-TLC, H-NMR, C-NMR and CIMS specrtum. Significant cytotoxic activity against three tumor cell lines (liver, cervix & breast), was re...

Topical application of 2% neem oil mixed in mustard oil provides 86.1% protection for about 7 hours against the bite of Phlebotomus papatasi (Scopoli) under laboratory conditions (Sharma and Dhiman, 1993). One ml of 5% neem oil in acetone applied to cardboard mats when used on electric heating device marketed for use for synthetic pyrethroid mats, have been reported 100% effective as space repe...