Effectiveness of different control measures against
cabbage butterfly (Pieris
brassicae
nepalensis Doubleday).
Devkota Y. N., R. C. Sahu, G. B. KC and Y. D. GC. 2007.
IAAS Research Advances Vol. 2. Institute of Agriculture and Animal Sciences, Rampur,
Chitwan,
Nepal. pp. 73-75.
Keywords:
Cabbage butterfly, Pieris
brassicae nepalensis, biomultineem, malathion
This study was carried out in Randomized Complete Block Design (RCBD) with five
replications at Manari V.D.C., Nawalparasi district during December 2000 to
April 2001. The experiment consisted of four treatments, namely: 1) use of Bio-multineen
(a neem based, organic insecticide), 2) use of Malathion (a safe, chemical
insecticide) 3) hand picking of eggs and larvae, and 4) control (neither hand
picked nor pesticide sprayed). Cabbage variety Copen Hegan Market was planted in
4 m2 plots at 50 cm x 50 cm spacing. In each plot, an egg mass or
equivalent number of larvae of P. brassicae nepalensis were released as a
bench-mark before starting the control measures, which was repeated three times
at seven days interval. On the basis of marketable head yield, hand picking was
the best control method as it gave 10.4 mt/ha followed by Malathion (9.8 mt/ha),
Biomultineem (5.8 mt/ha) and control (3.9 mt/ha). On the basis of killing
capacity of insect-pests, Malathion was found the most effective, followed by
hand picking, Biomultineem and control, respectively.
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