熟芝麻对韭蛆的田间防效及韭菜生长的影响OA

In order to investigate the insecticidal and fertilizer efficiency of roasted sesame seeds in Chinese chive production,37.5,75,150 kg/hm2 of roasted white sesame seeds were applied respectively in the Chinese chive field,with 75 kg/hm2 organic fertilizer and 75 kg/hm2 phoxim granules as controls.The results showed that the three doses of sesame seeds which were basal applied all had control effects of no less than 90.9%on Bradysia odoriphaga in the sowing year of Chinese chive;in the second year,the control effect of 37.5 kg/hm2 dosage was 42.3%,higher than phoxim granules.As the increase of the amount of sesame seeds to 75,150 kg/hm2,although the percentage of damaged plants increased,compared with the effects of strengthening seedlings,promoting growth and increasing yield,the stress of B.odoriphaga could be negligible.There were no significant differences in ground temperature at the 10 cm of Chinese chive roots among treatments.In conclusion,the basal application of 37.5 kg/hm2 sesame seeds effectively controls the damage of B.odoriphaga and has significant effects on promoting the growth and quality of Chinese chive.When increasing the amount of sesame seeds,the growth of Chinese chive improves,and the harm of B.odoriphaga can be negligible.The principle of insect prevention is not the variation of the ground temperature.