Abstract:
The experiment was conducted at the farm of Sher-eBangla Agricultural University,
Dhaka during the period from November 2019 to April 2020 to study the effect of
different plant extract on yield and seed quality of country bean. The experiment
consisted of 7 treatments such as T
1
(Neem seed extract), T
2
(Neem oil), T
3
(Mehogoni
seed extract), T
4
(Black pepper extract), T
5
(Garlic extract), T
6
(Tobacco extract) and
Untreated control. The experiment was laid out in Randomized Complete Block Design
with three replications. Results revealed that at early, mid and late pod development
stage, the minimum incidence of number of bean pod borer larva plant
(5.97, 7.89 and
8.54, respectively) and number of aphid plant
-1
(2.49, 2.23 and 4.27, respectively) was
recorded in the T
2
(Neem oil) treated whereas untreated control treatment showed highest
incidence of bean pod borer larva and aphid plant
-1
. Considering pods plant
at early, mid
and late pod development stage, the highest number of healthy pods plant
(88.11, 138.90
and 72.77, respectively) and highest pod weight plant
-1
(483.33, 658.33 and 247.33 g,
respectively) were harvested from T
2
(Neem oil) treatment. In terms of % reduction of
infestation over control by number and weight, T
2
(Neem oil) treatise with the showed
best performance and this treatment also showed the highest number of inflorescence
plant
-1
(30.86), number of flower inflorescence
(10.57), pod length (11.19 cm), number of pods plant
(1470.67 g), pod yield (14.71 t ha
-1
-1
-1
-1
-1
(16.01), number of pods inflorescence
), seed yield plant
-1
(326.03 g), weight of pods plant
-1
(179.90 g) and seed yield ha
(1799.00 kg) followed by T
5
(Garlic extract) treated plot whereas untreated control
showed poorest results. The treatment T
2
(Neem oil) also produced the best quality seeds
and showed highest seed germination (92.67%), shoot length (8.01 cm), root length (4.17
cm) and seed vigor index (1129.00) of 12 days aged seedlings followed by T
5
(Garlic
extract) treated plot whereas untreated control treatment gave the poorest result. So, it
may be concluded that the treatment T
2
(Neem oil) can be considered as best against
aphid and bean pod borer infesting country bean and production of quality seeds.
Description:
A Thesis
Submitted to the Institute of Seed Technology
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
SEED TECHNOLOGY