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Volume 2, Issue 3      July-September, 2014

EVALUATION OF DIFFERENT NEEM PRODUCTS IN COMPARISON WITH IMIDACLOPRID AGAINST DIFFERENT MORPHS OF MUSTARD APHID (LIPAPHIS ERYSIMI KALT.) ON CANOLA CROP
 
Muhammad Asif Aziz1, Ali Raza Shahzad1, Muhammad Naeem1, Ghulam Shabbir2
1Department of Entomology, 2Department Plant Breeding and Genetics, PMAS Agriculture University Rawalpindi
 
ABSTRACT
Studies were conducted to evaluate different neem extracts i.e., Neem leaf extract (10%), Neem seed oil (2.5%), Neem seed cake extract(10%), Neem seed kernel extract (10%) in comparison with imidacloprid (Confidor 70 WG) against different morphs of mustard aphid on Brassaica napus L. Among the all treatments imidacloprid and Neem seed oil resulted in maximum (100%) reduction over precount including nymph, wingless and winged adults of Lipaphis erysimi, followed Neem seed cake extract (86.13, 89.90 & 68.48%) and Neem seed kernel extract (77.41, 55.11&34.26%).Imidacloprid and neem seed oil showed negative impact on the population increase index of parasitoids and predators of L. erysimi. All neem extracts had positive population increase index of mummified aphids. Neem leaf extract resulted in negative population increase index in case of predators. Neem seed kernel extract showed positive index in case of green lacewing and lady bird beetle larvae and Neem seed Cake extract showed positive population increase index in case of only lady bird beetle larvae. Maximum repellency effect was observed with both Neem leaf extract and Neem Cake Extract (97.92%) and minimum in case of Neem seed kernel extract (89.58%). Neem seed oil resulted in maximum mortality of aphids followed by Neem Cake Extract. Reproduction (nymphs/aphid) was minimum with Neem seed oil followed by Neem Cake Extract. Highest net income was obtained by application of imidacloprid followed by Neem seed oil followed by Neem seed cake extract. Being effective against aphids and comparatively safer against natural enemies neem products especially Neem cake extract may be used in eco friendly management of mustard aphid on B. napus.
Keywords: Neem leaf extract, Neem seed oil, Neem seed extracts, imidacloprid, Lipaphis erysimi, canola
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