植物提取物Ts-39与嘧霉胺原药混剂对番茄灰霉病菌联合毒力研究

The synergistic effect of the mixtures of plant extract Ts-39 and fungicide pyrimethaml on Bortrytis cinerea Pers from tomato

采用Horsfall方法,以植物提取物Ts-39与嘧霉胺不同配比混剂对番茄灰霉病菌的联合毒力进行了研究,两种单剂不同配比包括10∶0、9∶1、8∶2、7∶3、6∶4、5∶5、4∶6、3∶7、2∶8、1∶9、0∶10,其中大部分比例增效比值在1以上,8∶2的增效比值最大达到了1.57。将不同比例的混剂在五叶期番茄幼苗上进行了进一步验证,结果表明提取物Ts-39与嘧霉胺不同配比的混剂在番茄幼苗上有增效作用,而且8∶2为11个配比混剂中的最佳配比,增效比值达到1.7,可以作为今后研究和开发的对象。

The synergistic effect of the mixtures between plant extract Ts-39 and pyrimethaml in different proportions （10 ： 0、9 ： 1、8 ： 2、7： 3、6 ： 4、5 ： 5、4： 6、3 ： 7、2 ： 8、1 ： 9、0 ： 10） on Bortrytis cinerea Pers from tomato was studied by using methods of Horsfall test design. The result of the experiment indicated that most of the treatments had synergistic effects and the combination of 8：2 showed the strongest synergistic ratio （SR） of 1.57. Synergistic effects of the mixtures were further tested on tomato plant at the five-leaf stage of seedlings. The result showed that most mixtures had synergistic effects and the synergistic ratio （SR） of the combination of 8：2 was the highest. So the proportion of 8：2 is the optimal synergistic mixture ratio in the eleven mixtures, which could be further developed and studied.