Papers

EFFECT OF DIFFERENT TRANSPLANTING DATES FOR THE MANAGEMENT OF THRIPS IN ONION (Pages : 9 - 13)

M.M. HOSSAIN, K.M. KHALEQUZZAMAN, M.J. KHATUN, M.M. HOSSAIN AND M.S. ALAM

The field experiment was conducted at SRC, Bogra during Rabi season of 2013-14 to assess the effect of varying transplanting dates on thrips populations and onion bulb yield. The treatments were T1= 20 November (1st transplanting); T2= 05 December (2nd transplanting); T3= 20 December (3rd transplanting); T4= 05 January (4th transplanting) and T5= 20 January (5th transplanting). Transplanting was done at 15 days interval from November to January. Results showed that early transplanting in 20 November and 5 December had fewer thrips (7.81 thrips/plant and 10.76 thrips/plant) than the subsequent ones. November transplant was free of thrips up to 9 weeks after transplanting (WAT), December transplanting up to 8 WAT and January transplanting up to 4 WAT. Onion bulb yields were also found to differ in descending order as follows: 20 November (21.85 t/ha)> 05 December (18.98 t/ha)> 20 December (18.50 t/ha)> 05 January (7.26 t/ha)> 20 January (5.28 t/ha).Download


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