Abstract:
The experiment was conducted under the central farm of Sher-e-Bangla Agricultural
University, Dhaka in order to assess the efficacy of some promising botanicals
against tomato leaf miner and tomato fruit borer. There were seven treatments and
three replication per treatment used in a randomized complete block design
(RCBD). The treatments were Neem leaf extract, Datura seed extract, Garlic bulb
extract, Mahogany seed extract, Black pepper seed extract, Alamonda leaf extract
and control. In case of leaf infestation by tomato leaf miners, the lowest leaf
infestation (2.08% per plant) during the vegetative stage was obtained from neem
leaf extract and the highest leaf infestation (10.19% per plant) was obtained from
the control treatment (untreated). Similarly during fruiting stage, the lowest miner
induced fruit infestation (3.18% per plot) was obtained from neem leaf extract
whereas; the highest fruit infestation (14.64% per plot) was obtained from the
control treatment (untreated). The lowest number of tomato fruit borer infested
fruits in early, mid and late fruiting stage was 2.67, 5.63 and 4.48 fruits per plot
which are obtained from neem leaf extract. On the other hand, the highest infested
fruits were obtained from control treatment (11.33, 16.28, and 13.55 fruits per plot)
respectively. However, in terms of healthy fruits per plot and weight of healthy fruits
per plot, highest yield was obtained from neem leaf extract in all fruit bearing stages.
Current study will help in botanicals control of tomato leaf miner and tomato fruit
borer in tomato plants.
Description:
A Thesis
submitted to the department of entomology,
Sher-e-Bangla Agricultural University, Dhaka.
In partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
