Abstract:
The present experiment was conducted to evaluate some botanicals as pest management
practices against pest complex in tomato in the farm of Shcr-e-Bangla Agricultural
University, Dhaka during the period from November 2006 to April 2007. The experiment
consisted of 8 treatments such as T1: Neem leaf extract @ 0.5kg/L of water at 3 days interval;
T2: Neem leaf extract @ 0.5kg/L of water at 7 days interval; T3: Neem oil @ 3.0rnl/1- of
water at 3 days interval; T4: Neem oil @ 3.0mlIL of water at 7 days interval; '15: Garlic
extract @ 0.5kgIL of water at 3 days interval; T6: Marsh Pepper extract @ 0.5kgIL of water at
3 days interval; T7: Marsh Pepper extract 0.5kgIL of water at 7 days interval and Tg:
Untreated control. The lowest number (22.40) of white fly per plot was recorded from T3
treatment, while the highest number (145.00) of white fly per plot was recorded from
untreated control. The lower average leaf infestation (3.19%) was recorded from the
treatment T3 plots and the highest (15.77) leaf infestation was recorded from untreated
control. The lowest % of infested fruit by weight (3.47%) was recorded from the treatment T3
plots and the highest % of infested fruit by weight (14.45%) was recorded from untreated
control plots. The highest weight of fruit per hectare (66.80 t) was recorded from the
treatment T3 plots and the lowest (56.86 t) weight of fruit per hectare was recorded from
untreated control plots. The highest weight of healthy fruit per hectare (64.48 t) was recorded
from the treatment T3 treated plots and the lowest (48.65 t) weight of healthy fruit per hectare
was recorded from untreated control plots. Considering the controlling of tomato fruit borer
highest benelit cost ratio (2.82) was recorded in the T.1 treated plots (application of Neem oil
at 3 days interval) on the other hand the lowest cost benefit ratio (0.06) was recorded in T2
treated plots. Among the different treatments Neern oil application at 3 days interval was
most effective than other treatment. The botanieals which applied at 3 days interval were
effective than those applied at 7 days interval in conti-olling insect pests of tomato
Description:
A Thesis
Submitted to the Department of Entomology
Sher-e-Barrgla Agricultural University, Dhaka,
in partial fulfilment of the requirements for the degree of
MASTER OF SCIENCE (M.S.)
IN
ENTOMOLOGY
SEMESTER: JULY- DECEMBER, 2007
