Abstract:
The experiment was conducted at the Farm of Sher-e-Bangla Agricultural
University, Sher-e-Bangla Nagar, Dhaka, Bangladesh to study the effect of some
botanicals and bio-control agents in controlling Brinjal Shoot and Fruit Borer
(BSFB) during the period from April to October 2009. The experiment consists of
the following management practices: T1: Neem oil @ 4ml/L of water at 7 days
interval; T2: Neem seed kernel @ 300g/L of water at 7 days interval; T3:
Trichogramma evanescense @ 0.1g/6 m2 at 7 days interval; T4: Bacillus
thuringiensis serovar kurstaki @ 1.5ml/L of water at 7 days interval; T5: Bacillus
thuringiensis serovar kurstaki @ 1ml suspension/L of water + Safeclean 2.5
ml/L of water at 7 days interval; T6: Botanical pesticides Safeclean 5 ml/L of
water at 7 days interval and T7: Untreated control. The plants treated with T1
treatment (Neem oil @ 4 ml/L of water at 7 days interval), resulted significantly lowest
percentage of infested shoot &fruit compared to those of other treatments during early,
mid and late fruiting stage. Significantly the highest yield was obtained in plant under the
treatment T1. The treatments T2(Neem seed kernel @ 300g/L of water at 7 days interval)
and T3(Trichogramma evanescence @ 0.1g/6 m2 after 7 days interval) also gave more or
less similar result as treatment T1. The yield contributing characters found highest in T1
treatment for length and girth of fruits, weight of individual fruit, edible portion, non
edible portion and yield per hectare. The highest Benefit Cost Ratio was found in T1 may
be due to the minimum infestation and cost compared to the other treatment components
and the highest yield was produced in this treatment. Length, girth of healthy fruits,
individual fruit weight and edible portion of fruit showed significant positive relation
with yield of brinjal.
Description:
A thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
ENTOMOLOGY
SEMESTER:JANUARY-JUNE, 2010