Abstract:
To evaluate the effect of some chemicals and botanicals on jassid, Amrasca biguttula biguttula
Ishida in brinjal and their impact on spiders and lady bird beetles. a field experiment was
conducted at the experimental farm of Sher-e-Bangia Agricultural University. Dhaka during
February to August 2007. The experiment comprised nine treatments viz. irnidachloprid 200
SL. cypermethrin 10Ee. carbosulfan 20EC, thiarnethoxarn 25WG. neern seed kCI11e1.neern oil
combined with trix, trix, mahua leaf extract and an untreated control. It was laid out in a
randomized completely block design with 3 replications. The lowest population of adult (2.36
plane' at vegetative stage and 9.80 plant" during fruiting stage) and nymph (0.73 plant" at
vegetative stage and 1.67 plant" during fruiting stage) was observed in carbosulfan treated
plots. which gave the maximum protection of brinjal against jassid attack by reducing pest
population. Among the botanicals tested, neern oil in combination with trix, and neern seed
kernel showed satisfactory control ofjassid on brinjal. Trix and mahua leaf extract reduced the
infestation of jassid in comparison with control but their effectiveness was not satisfactory.
Carbosulfan, imidachloprid and cypermethrin reduced more than 80% population of spiders and
lady bird beetles.
