Dr. Md. Abul Khayer Mian is presenting a Scientific Paper at Weed Science Scoiety of Bangladesh held at Shere-Bangla Agricultural University on 1 January 2011.Abstract
WEED INFESTATION IN SOME RABI CROPS UNDER AEZ-11
M.A.K. Mian, M.R. Islam, M. J. Alam, M.R. Humauan and B. Akhter
Regional Agricultural Research Station, Ishurdi, Pabna
A study was carried out at the Regional Agricultural Research Station, Ishurdi, Pabna, under AEZ-11, to observe the nature of weed infestation in some rabi crops. Seven crops field viz. lentil. mustard, maize, wheat, foxtail millet, chickpea and coriander were selected for the purpose. Weeds sample was collected randomly from four places from each field using a quadrat (1m × 1m). Samples were separated and counted species wise. After air dry, the sample was oven dried at 800C for 72 hours. Afterwards, dry weight of weed was calculated. Maximum weed population was noticed in lentil (564/m2) field followed by maize (404/m2), mustard (392/m2) and wheat (388/m2) field while lower weed population in coriander (352/m2), foxtail millet (306/m2) and chickpea (165/m2). Weed growth was the highest in lentil (81 g/m2) field followed by mustard (54 g/m2) but the lowest in chickpea (23 g/m2) while other showed the intermediate growth (39-45 g/m2). Among the major infesting weed species, Cyperus rotundus L. was the most dominating one in all crops. Other major infesting weed species were Croton sparsiflorus L, Cynodon dactylon (L.) Per, Physalis hereophylla L. Ischaemum rogosum, Chenopodium album, Brassica kaber L. E. Wheeler. Lentil was severely affected by weed completion as compared to other crops.
About Presentation
Remarks and Conclusions
• Cyperus rotundus L. was the most dominating weed species in respect of absolute density and relative density in all studied rabi crops.
• Other major infesting weed species were Croton sparsiflorus L., Physalis heterophylla L., Amaranthus spinosus L. Ischaemum rogosum, Chenopodium album L., Brassica kaber. L.E. Wheeler, Argemone mexicana L. and Cynodon dactylon (L.) pers.,
• Weed population was found the highest in lentil field (564/m2) followed by maize field (404/m2).
• Weed dry matter weight was the maximum in lentil (81g/m2) followed by mustard (54 g/m2).
• Intensity of weed infestation was the highest in maize (75.80) while it was relatively stable and lower in other crops (4.09-5.76).
• Weed control measure should be taken giving more emphasis on controlling Cyperus rotundus L. as it was the most dominating species.
M.A.K. Mian, M.R. Islam, M. J. Alam, M.R. Humauan and B. Akhter
Regional Agricultural Research Station, Ishurdi, Pabna
A study was carried out at the Regional Agricultural Research Station, Ishurdi, Pabna, under AEZ-11, to observe the nature of weed infestation in some rabi crops. Seven crops field viz. lentil. mustard, maize, wheat, foxtail millet, chickpea and coriander were selected for the purpose. Weeds sample was collected randomly from four places from each field using a quadrat (1m × 1m). Samples were separated and counted species wise. After air dry, the sample was oven dried at 800C for 72 hours. Afterwards, dry weight of weed was calculated. Maximum weed population was noticed in lentil (564/m2) field followed by maize (404/m2), mustard (392/m2) and wheat (388/m2) field while lower weed population in coriander (352/m2), foxtail millet (306/m2) and chickpea (165/m2). Weed growth was the highest in lentil (81 g/m2) field followed by mustard (54 g/m2) but the lowest in chickpea (23 g/m2) while other showed the intermediate growth (39-45 g/m2). Among the major infesting weed species, Cyperus rotundus L. was the most dominating one in all crops. Other major infesting weed species were Croton sparsiflorus L, Cynodon dactylon (L.) Per, Physalis hereophylla L. Ischaemum rogosum, Chenopodium album, Brassica kaber L. E. Wheeler. Lentil was severely affected by weed completion as compared to other crops.
About Presentation
Remarks and Conclusions
• Cyperus rotundus L. was the most dominating weed species in respect of absolute density and relative density in all studied rabi crops.
• Other major infesting weed species were Croton sparsiflorus L., Physalis heterophylla L., Amaranthus spinosus L. Ischaemum rogosum, Chenopodium album L., Brassica kaber. L.E. Wheeler, Argemone mexicana L. and Cynodon dactylon (L.) pers.,
• Weed population was found the highest in lentil field (564/m2) followed by maize field (404/m2).
• Weed dry matter weight was the maximum in lentil (81g/m2) followed by mustard (54 g/m2).
• Intensity of weed infestation was the highest in maize (75.80) while it was relatively stable and lower in other crops (4.09-5.76).
• Weed control measure should be taken giving more emphasis on controlling Cyperus rotundus L. as it was the most dominating species.
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