Abstract:
The experiment was conducted to study the effect of intercropping on the incidence of
aphid population in mustard and its impact on pollinators during the period from
October, 2017 to February, 2018. The experiment consisted of seven different treatments
(each treatment was intercropping with mustard, Brassica napus) viz T
= Mustard
intercropped with cabbage (Brassica oleracea var. capitata); T
= Mustard intercropped
with onion (Allium cepa L.); T
3
2
= Mustard intercropped with garlic (Allium sativum L);
T
4
= Mustard intercropped with black seed (Nigella sativa); T
= Mustard intercropped
with coriander (Coriandrum sativum L.); T
6
5
= Mustard intercropped with radish
(Raphanus raphanistrum subsp. sativus) and T
= Sole mustard as Untreated control. Sole
trimming of mustard was additionally developed to think about the adequacy of
intercropping framework. The design of experiment was randomized complete block
design (RCBD) with three replications. From result it revealed that, when the number of
aphid was lower (13.72) at mustard + coriander (T
7
) at that time, total number of infested
plant/plot (1.48), number of aphid infested branch/plant (1.58), percent of Branch
infestation (19.65), percent of Flower infestation(44.38), percent of pod infestation
(24.74) were decreased; on the other hand at that time total number of pod/branch
(19.45), Number of different pollinators such as honeybee (Apis indica)/plant (4.28),
wasp (2.26), syrphid fly (2.26); the presence of beneficial insects like lady bird
beetle/plot (19.63); Number of healthy pod/plant (82.99) and grain yield per plot
(454.74) was increased. The overall result indicates that the intercropping of mustard
with onion, garlic, coriander and black seed/black cumin decreased the incidence of
aphid population on mustard and increased the abundance of visiting different pollinators
and other beneficial insect populations compared to sole cropping of (mustard).
5
1
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
SEMISTER: JUNE,2018
