Abstract:
The study was conducted in research field of the Department of Entomology, Shere-Bangla
Agricultural
University, Dhaka in order to study the incidence of insect
pests on cauliflower and management of major pests. Five treatments such as
Sevin, Abamectin, Spinosad, Cypermethrin and control were used in this study.
The experiment was conducted in a randomized complete block design (RCBD)
with four replications. Eight insect pests such as diamond back moth (Plutella
xylostella L.), cabbage butterfly (Pieris brassicae), tobacco caterpillar (Spodoptera
litura Fab.), mustard aphid (Lipaphis erysimi (Kalt.), flea beetle (Phyllotreta
cruciferae Goeze.), painted bug (Bagrada cruciferarum Kirk.), whitefly (Bemisia
tabaci Genn.) and cabbage aphid (Brevicornye brassicae L.) was found to infest
cauliflower in field of which the former four was frequently observed and the
latter were appeared in traces. Population of diamondback moth, tobacco
caterpillar, cabbage butterfly and aphid were gradually increased with the age of
the crop and the peak population was observed at 45
viii
th
SW, at 48
th
SW
and at 51
st
SW, respectively. In context of controlling insect pests of cauliflower,
the lowest number of diamondback moth caterpillar population (0.42 larvae per
plot), aphid (13.08 aphids per plot), tobacco caterpillar (0.98 larvae per plot) and
cabbage caterpillar population (0.13 larvae per plot) obtained from Spinosad. The
same treatment also gave the highest curd yield (51.48 t ha
-1
) of cauliflower.
Considering pest infestation, curd yield and environmental safety, spinosad may be
used for the management of major insect pests of cauliflower.
Description:
A Thesis
Submitted to the Department of Entomology
Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
