石灰氮对韭菜迟眼蕈蚊的杀虫活性及控制效果

Toxicity and Control Effects of Lime Nitrogen Against Bradysia odoriphaga

以韭菜迟眼蕈蚊为试虫,采用药液灌根法,研究了石灰氮对韭菜迟眼蕈蚊不同虫态的毒力、田间控制效果及对韭菜的安全性,以期寻找出防治韭蛆的高效安全产品。结果表明:石灰氮对韭蛆幼虫毒杀活性高,尤其是对低龄幼虫最高;对卵和蛹的毒杀效果低于幼虫。室内试验表明石灰氮对成虫产卵有明显的驱避效果;盆栽试验和田间试验表明成虫发生期施用石灰氮对韭蛆控制效果明显,幼虫期施用也有较好的杀虫效果;田间安全性试验结果表明,667m^2石灰氮用量1.5~6.0kg对韭菜安全无害,且能有效提高韭菜产量。

In order to look for the safe and efficient protection on Bradysiaodoriphaga Yang and Zhang,B.odoriphaga was used as test insect and by using root pouring treatment,the toxicity and control effects of lime nitrogen to B.odoriphagain different stages and the safety on Chinese chives were measured.The results showed that the toxicity of lime nitrogen was high on larvae of B.odoriphaga,especially for the low instar larvae.The toxicity to eggs and pupae was weakened than larvae.The indoor experiment proved that lime nitrogen had obvious repellent of oviposition in adult stage.Pot and field experiments showed that the control effect was obvious to B.odoriphagaat adult period,the larvae period had similar effect.The security test results showed that lime nitrogen was safe for leek within 1.5-6.0kg per 667m^2,and could effectively increase the yield of leek.