International Journal of Applied Research
Vol. 1, Issue 11, Part K (2015)
Bio-efficacy of some green pesticides towards mortality and repellency against Petrobia harti Ewing (Acari: Tetranychidae) infesting medicinal weed, Oxalis corniculata L. (Oxalidaceae)
Subhasree Mitra, Salil Kumar Gupta, Sujay Ghosh
The laboratory trial of five green pesticides towards causing mortality of Petrobia harti (Ewing) indicates that the leaf extract of Clerodendron inerme, followed by extract of Tagetes erecta both at 1.5% registered mean mortality of 92.50% and 82.63%, respectively. Regarding repellency test with 5 plant extracts, viz. Lemon grass (Cymbopogon martini), Nishinda (Vitex negundo), Marigold(Tagetes erecta), Lemon leaf (Citrus limon), Tulsi (Ocimum sanctum), it revealed that marigold extract had shown highest repellency (70%) followed by Tulsi(65%).