M. M. KHATUN1*, M. K. R. BHUIYAN2, M. A. HOQUE3 and AMINUR RASHID4
1Senior Scientific Officer, 2Principal Scientific Officer, Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, 3Professor, Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka and 4Additional Agriculture Officer (Deputation), IPM Specialist, IPM Project, Department of Agricultural Extension, Khamarbari, Dhaka, Bangladesh. *Corresponding author’s Email: mmkhatun@yahoo.com
ABSTRACT
Seasonal incidence distribution and management of red spider mite were studied at field experiment at in vivo condition two kharif season during 2014- 2015. Incidence of mite population reached high during 4th week of April when the weekly average temperature, relative humidity and rainfall were 34.1oC, 81% and 10 mm respectively. The most densely mite population was found in older leaf (59.09%) followed by young leaf (29.54%) and newly emerged leaf (11.36%). Among the five treatments, the lowest percent of infested leaf per plant was recorded in Vertimec 1.8 EC (Abamectin 1.8 EC) (28.50%) and followed by Soap powder + alternate spray of Neem seed extract treated plots. The height percent of infested leaf per plant found in control plot (92.38%) and it was significantly different from all other treatments. However, the reduction of mite population over control was maximum (70.91%) in T4 (Vertimec 1.8 EC) treatment and closely followed by Soap powder+ alternate spray of Neem seed extract (63.71%) and they were significantly different from all other treatments. The yield of stolon was the highest in Vertimec 1.8EC treated plots (17.00 t /h).
Keywords: Epidemiology, Management approach, Red Spider Mite and Panikachu.