Crop weed competition and chemical control of weeds in Brinjal (Solanum melongena L.).

摘要

A field experiment was conducted during summer season of 2009 to study the crop weed competition and to assess the performance of pre-emergence weedicides in controlling weeds in Brinjal. The experiment consisting of 10 treatments comprising 4 weedicides (alachlor at 1.0 and 1.5 kg a.i./ha/butachlor at 1.0 and 1.5 kg a.i./ha/pendimethalin at 1.0 and 1.5 kg a.i./ha/pretilachlor at 1.0 and 1.5 kg a.i./ha) compared with weed free check, unweeded control. Results revealed that the application of butachlor and pretilachlor at 1.5 kg a.i./ha were found to be phytotoxic while pendimethalin at 1.0 and 1.5 kg a.i./ha was found not phytotoxic to the brinjal. The number of monocots, dicots, total number and total dry weight of weeds were found to be maximum in unweeded control and weed control treatments decreased these parameters but pendimethalin at 1.5 kg a.i./ha was the lowest. WCE (%) was highest with the pendimethalin at 1.5 kg a.i./ha. The yield parameters viz., fruit length, fruit diameter, fruit stalk length, fruit volume and fruit yield decreased significantly in unweeded control while weed index was higher. The fruit yield was significantly higher with application of pendimethalin at 1.5 kg a.i./ha.