不同药剂对小麦赤霉病DON毒素及田间防效的影响

Effects of Different Fungicides on DON Toxin of Wheat Scab and its Control Effect in the Field

为了研究小麦赤霉病的防效及毒素残留,选用氰烯菌酯·戊唑醇等8种药剂对试验田块喷施,分析不同药剂、不同施药次数对DON毒素的影响。结果表明,喷施药剂的次数和时间并不影响DON毒素的含量;在毒素测定试验中,氰烯菌酯·戊唑醇能有效降低DON毒素含量,其次是氰烯菌酯,且具有持效性,但随着用药时间的推移,防效逐渐下降;最后推荐使用烯菌酯·戊唑醇在扬花初期及灌浆初期喷施2次用药。

In order to study the control efficiency and toxin residue of wheat scab,8 kinds of medicaments such as cyanoplast and pentazolol were sprayed on the test field,and the effects of different medicaments and different application times on DON toxin of scab were analyzed.The results showed that the times and periods of insecticide application did not affect the content of DON toxin in scab.In the test of toxin determination,the content of DON toxin in scab was effectively reduced by cyanobacterin and pentazolol,followed by cyanobacterin,and it had a lasting effect,but with the passage of the administration period,the control effect gradually decreased.Finally,it is recommended to use enomycin and pentazolol to spray twice at the beginning of flowering and the beginning of grouting.