Abstract:
An experiment was conducted in the farm of Sher-e-Bangla
Agricultural University, Sher-e-Bangla nagor, Dhaka, Bangladesh during
March to June 2014to study the major insect pests of yard long bean
(Vignasesquipedalis) and their management. The seeds of Kegornatki were
used as the test crop for the experiment. The experiment consisted of seven
treatments viz. T1(Emamectin benzoate (wonder 5G) @ 1g/L of water),
T2(Volium flexi 30EC @ 0.5 ml/L of water), T3(Lamdacyhalothrin 2.5EC @
1 ml/L of water), T4(Imidachloprid @ 0.5 ml/L of water), T5(Abamectin 1.8
EC @ 1.2 ml/L of water), T6(Neem oil @ 5 ml/L + Trix) and T7(Untreated
control). The experiment was laid out in Randomized Complete Block
Design (RCBD) with three replications. Data on the number of pests per
plant, number and weight of healthy and infested pod and percentage of pod
infestation in number and weight, yield contributing characters and yield of
yard long bean were recorded and statistically analyzed. Significant
variation was found among the different treatments regarding different
parameters of the crop. Incidence of major insect pests of yard long bean
was recorded for the entire cropping season and aphid, jassid, pod borer and
epilachna beetle were observed. At early, mid and late pod stage, the lowest
% pod infestation (in number) (10.60 %, 5.27 % and 10.03 % respectively)
was observed from Voliam flexi 300SC, while the highest infestation
(36.87%, 31.01% and 38.99% respectively) was recorded in Untreated
control. Similar results were found for pod infestation in weight basis. The
highest yield per hectare was recorded from Voliam flexi 300SCwhile the
lowest yield was recorded from Untreated control.
Description:
A Thesis
Submitted to
Department of Entomology
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
SEMESTER: JANUARY-JUNE, 2015