4种杀线虫剂对南方根结线虫的室内活性测定

Biological Activity of Four Nematicides on Meloidogyne incognita

通过藏红T染色法,确定线虫染色时间,并测定4种常规药剂对南方根结线虫的室内活性。结果显示,染色1 h后,线虫的染色率达到100%。1.8%阿维菌素EC和40%灭线磷EC对南方根结线虫具有良好的活性,LC_(50)值分别为14.926 3 mg/L和15.306 8 mg/L;40%辛硫磷EC和200 g/L丁硫克百威EC活性较差。

Laboratory experiment was conducted with four selected nematicides for Meloidogyne incognita,the dying time and toxic activity were determined by Safranine-T staining method. The results showed that the staining rate of Safranine-T reached 100%. Abamectin 1.8% EC and ethoprophos 40% EC had higher biological activities on Meloidogyne incognita,with LC50 values of 14.926 3 mg/L and 15.306 8 mg/L. Phoxim 40% EC and carbosulfan 200 g/L EC had less activities on Meloidogyne incognita.