米糠油对小麦中玉米象(Sitophihus Zeamais)的防治效果研究

Study on Insecticidal Efficacy of Rice Bran Oil on Maize Weevil

通过米糠油对玉米象生物效应的实验室测定表明米糠油在不拌粮条件下，对玉米象有明显的引诱作用，引诱虫量与米糠油用量成正相关，在拌小麦条件下，对玉米象有明显的驱避作用，驱避率随米糠油用量的增加而上升，用量达１１．８ｍｌ／ｋｇ时，驱避率为９４．４％；当用量≥４ｍｌ／ｋｇ的米糠油拌粮时，对玉米象成虫有致死作用，用１６ｍｌ／ｋｇ拌粮时３－１０天后成虫死亡率达到７１．８－８５％；米糠油能抑制玉米象的繁殖，降低Ｆ１数量，当米糠油用量为４－８ｍｇ／ｋｇ时，玉米象繁殖抑制率为８８．１－９８．６％；米糠油对玉米象成虫无熏杀作用。

The influence of rice bran oil on maize weevil was studied.The results showed that rice bran oil has evidently lure effects to maize weevil but also showed the deterring effects to maize weevil while mixed with wheat, the deterring effects amounted to 97.4% by mixing 1 kg wheat with 11.8ml rice bran oil. Rice bran oil has lethal effects to adult and reduce-number of F1 while mixed with wheat, The adult mortality amounted to 71.7-85% at a rate of 16ml per kg wheat for 3-10 day. The inhibition rate of reproduction amounted 88.1-98.6% at the dose of 4-8ml per kg wheat. However this oil has been proved to be of little fumigating effects to maize weevil.