Abstract:
A study on field efficacy of some bio-rational based management approaches against
fruit fly attacking sweet gourd was conducted at the research field of the Sher-e-Bangla
Agricultural University, Dhaka, during the period from November, 2021 to March,
2022. Some biorational management practices viz., T
1
: mass trapping of fruit flies with
cuelure based sex pheromone trap, T
2
ii
: azadirachtin (Fytomax 3EC), T
3
: mashed sweet
gourd poison bait trap, T
4
: spinosad (Success 2.5 SC) were evaluated along with T
5
:
farmers’ practice (Ripcord 10 EC) and T
6
: untreated control. Data on different
parameters such as fruit infestation by number and weight, yield and others were
recorded to fulfil the objectives. At flowering stage, effect of different biorationals on
infestation of female flowers by fruit fly varied significantly. Considering of healthy
female flowers production per plot, the highest number of healthy female flowers/plot
(14.05) were recorded from T
2
treatment which was significantly different from all
other treatments. Field efficiency of biorational management of fruit fly on sweet gourd
was significantly different among the treatments. The highest healthy fruit yield (30.85
t/ha) was recorded from treatments T
3
which was statistically different from other
treatments. The lowest healthy fruit yield (12.67t/ha) was recorded from treatments T
6
which was statistically different from all other treatments. The highest infested fruit
yield (6.15 t/ha) was recorded from treatments T
6
and the lowest infested fruit yield
(3.15 t/ha) obtained from the treatments T
3
which was significantly different from all
other treatments. The highest total fruit yield (34.00 t/ha) was obtained from T
3
treatment and lowest total fruit yield (18.82 t/ha) from T
6
treatment. Considering all
yield attributing parameters, treatment T
3
comprising mashed sweet gourd poison bait
trap gave the most satisfactory result.
Description:
A Thesis
Submitted to Department of Entomology,
Faculty of Agriculture.
Sher-e-Bangla Agricultural University,
Dhaka-
In partial fulfillment of the requirements for the degree of
MASTERS OF SCIENCE (MS)
IN
ENTOMOLOGY
