The rising trends of insect resistance, coupled with escalating environmental pollution from synthetic pesticides, heighten the need for a more effective and, non-hazardous agents to control insect/pests. Different aqueous extracts Mentha spicata were screened their phytochemical constituents and antifeedant activities against Spodoptera frugiperda. Screening different obtained by cold macerati...

An laboratory trial was conducted to assess the insect-pest rejectant compatibility of six ecofrindly botanical alcoholic extracts Viz., Azadirachta indica A.Juss., Adhatoda vasica Nees. Curcuma domestica Val. Lantana camara Linn., Ricinus communis Linn. and Vitex nugendo With control (untreated) were tested find out their comparative antifeedant effects worked against third instars larvae Diam...

Biological activity of a plant extract (common rue, Ruta chalepensis) and a semi purified fraction (from "tacaco cimarrón", Sechium pittieri) on mahogany shootborer larvae (Hypsipyla grandella) was studied. A randomized complete block design, with four replications, was used. H. grandella third instar larvae were exposed for 24 h to Cedrela odorata leaf discs dipped in several treatment dissolu...

Feeding deterrents or antifeedant chemicals are those chemicals which inhibit feeding of insect on a treated food material without necessarily killing or repelling them. Plants with ant feeding properties are increasingly being used against phytophagous insect pests for protection of crops. In the present study of growth regulating action of Leaf extract of Catharanthus roseus on development st...

The genus Gnaphalium, a herb distributed worldwide, comprises approximately 200 species of the Compositae (Asteraceae) family that belongs to the tribe Gnaphalieae. Some species are traditionally used as wild vegetables and in folk medicine. This review focuses on the phytochemical investigations and biological studies of plants from the genus Gnaphalium over the past few decades. More than 125...

Antifeedant and Insecticidal Activity of Quassinoids against the Diamondback Moth (Pintella rylostella) and Structure-Activity Relationships Masayuki DAiDo, Nobuhiro OHNo, Kazunori IMAMuRA, Narihiko FuKAMiyA, Makoto HATAKosHi," Hiroko YAMAzAKi,' Kiyoshi TAGAHARA,'" Kuo-Hsiung LEE,"** and Masayoshi OKANot Department of lhterdisciplinary Studies on Natural Ehvironment, Fbculty of lhtegrated Arts ...

Five annonaceous acetogenins, rolliniastatin-1 [structure: see text], rolliniastatin-2 [structure: see text], laherradurin [structure: see text], squamocin [structure: see text], annonacin [structure: see text], and rotenone as a reference, differing in their NADH oxidase inhibition activity, have been evaluated for antifeedant, insecticidal, trypanocidal and cytotoxic effects on insect, mammal...

Guided by bioassay test results, we have isolated an active compound from the hexane layer of the extract of Andrographis paniculata and it was identified as 14-deoxyandrographolide. Although this compound has been known as a medicine in Pharmacology, its antifeedant activity against insects has never been reported yet. The minimum effective dose (MED = 100μg/leaf disc) on the isolated compound...