Effects of Convolvulus arvensis Water Extract on Germination of Okra Under Different Seed Sizes

Convolvulus arvensis is a toxic allelopathic weed that suppresses germination and growth of crops. The prime object of present study was to investigate effect of Convolvulus arvensiswater extract on germination and performance of okra with different seed sizes. The seeds of okra variety pusa green were separated into three different sizes, viz large size (4.00-5.00 mm), medium size (3.00-3.50 mm) and small size (2.00-3.50 mm), and then soaked in allelopathic plant bindweed water extract and kept in patrisdishes for germination into the germinator at 15℃. The experiment was laid out using Complete Randomized Design (CRD) with three replications. The results showed that after sowing of 12 days the highest germination was observed in non-treated seeds as compared to seeds treated in Convolvulus arvensiswater extract for 1 h, further non-treated large seeds produced maximum plants as compared to treated small seeds after sowing of 24 days. Meanwhile, root length, shoot length, root fresh and dry weight, shoot fresh and dry weight were recorded higher in non-treated large seeds as compared to small seeds soaked for 1 h in Convolvulus arvensis allelopthic water extract. It could be found that Convolvulus arvensis affected germination, seed growth and overall performance of okra, further presence Convolvulus arvensis in crops could cause negative impact on germination and integrity of okra crops.