volume 38 issue 1 (march 2004) : 34 - 39

LARVICIDAL EFFECT'OF CARTAP HYDROCHLORIDE ~ AND AZADIRACHTIN AGAINST LEPIDOPTERAN / PESTS INFESTING COLE CROPS IN HP

P

Pankaj Sooo

S

Sanjeev Sharma

A

AK. Verma

Affiliations

¹Departme;'t ~f Entomology and Apiculture, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan - 173 230, India

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Cite article:- Sooo Pankaj, Sharma Sanjeev, Verma AK. (2025). LARVICIDAL EFFECT'OF CARTAP HYDROCHLORIDE ~ AND AZADIRACHTIN AGAINST LEPIDOPTERAN / PESTS INFESTING COLE CROPS IN HP. Indian Journal of Agricultural Research. 38(1): 34 - 39. doi: .

ABSTRACT

Cabbage butterfly, Pieris brassicae Linn. and diamond back moth, Plutella xylostella L. are the major pests of cabbage (Brassica oleracea var. capitata L) and cauliflower (B. oleracea var. botrytis L.) grown as off season crops in mid and high hills of Himachal Pradesh. Indiscriminate use of organochlorine, organophosphate and carbamate insecticides have resultedin residual toxicity and human health hazards. The present studies on the larvicidal effect of cartap hydrochloride and azadirachtin against P. brassicae and P. xylostella were conducted under laboratory conditions during 1994–95. The studies revealed that cartap hydrochloride and azadirachtin are effective larvicides. The LC 50 values of cartap hydrochloride for second, third, fourth and fifth instars larvae of P. brassicae were 6.523, 16.013, 55.461 and 80.608 ppm, respectively. The corresponding values of LC 50 against Second to fourth instar laniae of P. xylostellawere 5.070, 11.231 and 49.521 ppm, respectively. The LC 50 values of azadirachtin against second to fourth instar larvae of P. brassicaewere 1.581, 2.097 and 3.099 ppm, respectively, whereas against second and third larval instar of P. xylostella, the LC 50 values were 1.242 and 1.802 ppm, respectively. Both the chemicals were found to be highly toxic to the larval instars; however, azadirachtin was more toxic of the two insecticides against used instars of both the test species

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LARVICIDAL EFFECT'OF CARTAP HYDROCHLORIDE ~ AND AZADIRACHTIN AGAINST LEPIDOPTERAN / PESTS INFESTING COLE CROPS IN HP

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