Abstract:
The experiment was conducted at the Horticulture Farm of Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh during the period from September
2011 to May 2012 to study the management of mealybug in papaya plant. The
experiment consists of ten treatments chemicals pesticide including control
treatment for management of mealybug in papaya seedling viz. T1 = Shobicron
425EC, T2 = Imidacloprid (Admire) 200SL, T3 = Semcap 50EC, T4 = Cypermethrin
10EC, T5 = Fighter 25EC, T6 = Chloropyriphos 20EC, T7 = Dimethoin 40EC,
T8 = Imidacloprid (Bumper) 200SL, T9 = Decis 25EC and T10 = Control. The
experiment consists of eight treatments including control treatment for management
of mealybug in papaya plant viz. T1 = Shobicron 425EC, T2 = Imidacloprid 200SL,
T3 = Cypermethrin 10EC, T4 = Deltamethrin 25EC, T5 = Lambdacyhalothrin, T6 =
Semcap 50EC, T7 = Neem seed kernel extract and T8= Control. The experiment
was laid out in Randomized Complete Block Design (RCBD) single factor with
three replications. Significant differences were observed among different
management practices in terms of seedling, plants, leaves and fruits infestation
during the management of papaya mealy bug. Imidacloprid (Admire and Bumper)
200SL was the most effective on mealybug control as well as lowest number of
infested seedling was recorded. The lowest number of infested plant, number of
leaf infestation, number of infested fruits plant was recorded from Imidacloprid
200SL. The highest number of healthy plant per plot, number of healthy leaf per
plant, healthy fruit was found in Imidacloprid treated plot. Imidacloprid gave the
maximum protection of papaya in field from mealybug infestation.
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: JANUARY-JUNE, 2013
