Abstract
Mungbean is one of the important pulse crops in Bangladesh. More than 12 species of insect pests infest mungbean, among them flea beetle cause significant yield loss due to attack from seedling to vegetative stages. The experiment was conducted to find out tolerant and susceptible varieties of mungbean against flea beetle at the farmer’s field of Patuakhali, Bangladesh from January to April 2016. Results revealed that BARI Mung-4 had the lowest abundance of flea beetle while BINA Moog-7 and BARI Mung-6 had the highest flea beetle abundance. Among the tested all varieties, significantly the lowest number (1.33) of infested plant by flea beetle was recorded in BARI Mung-4 followed by BINA Moog-4 (1.51) and the highest number (2.54) of infested plant by flea beetle was in BARI Mung-6 followed by (2.42) BINA Moog-7. The lowest percentage of leaf area damaged was on BARI Mung-4 (5.37%) while the highest on BARI Mung-6 (11.33%). Population of flea beetle showed a positive correlation (R2= 0.019) with temperature and a negative correlation (R2= -0.01) with relative humidity. BARI Mung-6 produced highest yield while Patuakhali local Mung produced the lowest followed by BARI Mung-4. Among tested varieties BARI Mung-4 showed comparatively more tolerant against flea beetle and BARI Mung-6 produced maximum yield in spite of being susceptile to flea beetle.
Highlights
The area lies at 0.9 to 2.1 metre above mean sea level (Iftekhar and Islam, 2004). 15 mungbean varieties viz., Bangladesh Agricultural Research Institute (BARI) Mung-1, BARI Mung-2, BARI Mung-3, BARI Mung-4, BARI Mung-5, BARI Mung-6, Bangladesh Institute of Nuclear Agriculture (BINA) Moog-4, BINA Moog-5, BINA Moog-6, BINA Moog-7, BINA Moog-8, BU Mug-1, BU Mug-2, BU Mug-4 and Patuakhali local Mung were used as study materials
At 18 days after sowing (DAS), significantly the highest number of flea beetle per plot was recorded on BARI Mung-6 (2.04) which statistically similar to that of BINA Moog-7 (2.02)
At 32 DAS, significantly the highest number of flea beetle per plot was recorded on BINA Moog-7 (3.91) followed by that of BARI Mung-6 (3.33)
Summary
Pulses are a rich source of protein and have documented proof of their beneficial micronutrient, bioactive and functional properties (Philanto and Korhonen, 2003). Besides providing protein in the diet, mungbean has the remarkable quality of helping the symbiotic root rhizobia to fix atmospheric nitrogen and to enrich soil fertility (Anjum et al, 2006). It is a relatively drought-tolerant and low-input crop that grows in a wide range of climatic conditions. Flea beetle is the most damaging in the climatic condition of Bangladesh. Flea beetles attack mungbean severely which first appear at the seedling stage of the crop and maintained their population upto pod formation.
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