Ruhul Amin - Academia.edu (original) (raw)

Papers by Ruhul Amin

Abstract: Experiment was carried out at the Agronomy Field of Sher-e- Bangla Agricultural Univ... more Abstract:
Experiment was carried out at the Agronomy Field of Sher-e-
Bangla Agricultural University, Dhaka during the period from
December, 2012 to May, 2013 to investigate the response of different
levels of nitrogen and methods of weeding on the yield of hybrid boro rice (Heera 4). The treatments consisted of four nitrogen levels viz., No = 0 kg N ha-1, N1 = Urea super granules (2.7 g) @ 75 kg N ha-1, N2 =
140 kg N ha-1, N3 = 180 kg N ha-1 and five different weed control
methods viz., W0 =No weeding (Control), W1= One weeding (30 days
after transplanting), W2= Two weeding (30 DAT & 50 DAT), W3=
Sunrice 50WG at recommended dose (100g ha-1), W4=Topstar 80WG at
the recommended dose (@80g ha-1). The experiment was laid out in a
split plot design with three replications having nitrogen doses in the
main plots, weed control in the sub plots. Nitrogen and weed control
had significant response on yield and yield components of hybrid rice
viz., effective tillers hill-1 (No.), panicle length (cm), number of filled
grains panicle-1, number of unfilled grains panicle-1, total grain
panicle-1, weight of 1000-grain, grain yield, straw yield, biological
yield and harvest index (%). From the economic point of view,
significant highest (9.48 t ha-1) grain yield was found from the combination of USG with Sunrice 150.

The study was conducted at the Department of Entomology, Sher-e-Bangla Agricultural University, D... more The study was conducted at the Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka,
Bangladesh during November, 2012 to May, 2013 to eco-friendly management of brinjal shoot and fruit
borer (BSFB), Leucinodes orbonalis Guenee using some selected botanicals and chemical insecticides.
Eight treatments were applied started with 28 days after transplanting of seedlings and repeated at 7 days
interval and continued upto last harvest of the fruits. The treatments were T1= spraying of neem oil @
3ml/litre of water, T2= spraying of neem seed kernelextract @ 100g/litre of water, T3=spraying of neem
leaf extract @ 200g/litre of water, T4=spraying of garlic extract @ 2g/L of water, T5=spraying of Ripcord
10 EC @ 1ml/litre of water, T6=spraying of Suntap 50 SP @ 2ml/litre of water, T7=hand picking and
destruction of infested shoots and fruits and T8=untreated control. Results found that the lowest shoot
infestation (6.80%), lowest fruit infestation by number (13.67%) and weight (11.50%), maximum fruit
yield (23.95 t/ha) were achieved by Ripcord 10EC @ 1ml/L of water (T5) compared to all other treatments.
The highest percent reduction of shoot infestation (72.96%), the highest percent reduction of fruit
infestation by number and weight (72.58% and 69.70% respectively), percent increase of yield (147.85%)
over control were also achieved by Ripcord 10EC (Cypermethin 10 EC) @ 1ml/L of water. Thus it is
revealed that among the treatments T5(Ripcord 10EC @ 1ml/L of water showed the best performance for
controlling brinjal shoot and fruit borer followed bySuntap 50 SP (Cartap 50 SP) and Neem oil. Among
botanical based treatments, neem oil performed as the best treatment in reducing the highest infestation
(48.21% for shoot and 49.21% for fruit) caused by brinjal shoot and fruit borer.