تلخیص
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.
Ali Raza Shahzad, Muhammad Naeem, Ghulam Shabbir, Muhammad Asif Aziz. (2014) EVALUATION OF DIFFERENT NEEM PRODUCTS IN COMPARISON WITH IMIDACLOPRID AGAINST DIFFERENT MORPHS OF MUSTARD APHID (LIPAPHIS ERYSIMI KALT.) ON CANOLA CROP, Asian Journal of Agriculture and Biology, Volume 2, Issue 3.
-
Views
927 -
Downloads
70