Four generations of vegetable pests such as Spodoptera litura are one of the main factors affecting the high quality and high yield of vegetable cultivation. For the occurrence and control measures of four generations of vegetable pests such as Spodoptera litura, vegetable farmers must master well. The following Hui Nongwang Xiaobian compiled the recent situation and prevention opinions of four generations of vegetable pests such as Spodoptera litura, and hoped to help everyone.
According to the observation of pests and pests, the peaks of three generations of Spodoptera litura were on September 4-9 (the number of moths in single bottles was 138.7, 97.7, 55.7, 112.3, 107.3, 125.3, and 80)) From August 11th to September 10th, the average number of mops per day was 69.2, which was 6.9 fewer than the same period in 2017, a decrease of 10%.
It is predicted that the fourth generation of Spodoptera litura is moderately heavier and locally occurring; the peak of the first instar larvae is from September 13-18. At the same time, attention should be paid to the control of P. xylostella, Aphis gossypii, aphid and Chinese cabbage black spot, anthracnose, sclerotinia, leaf spot, soft rot, etc., and pay attention to the alternate use of pesticides and the safety interval. Make sure vegetables are safe to eat.
Control method:
1. Spodoptera litura
Prevention time: September 13-18.
Control agent: 5% chlorantraniliprole suspension 100 times solution, 15% cyanamide amide dispersible oil suspension 2500 times solution, or 10% chlorfenapyr suspension 1500 times solution for young larvae; The 4th instar larvae can be sprayed with 15% indoxacarb suspension 3500 times.
2, 猿å¶ç”², 黄曲æ¡è·³ç”²
It can be sprayed with 30% chlorzil and thiamethoxam suspension 2000 times solution, 10% cyanamide insecticide dispersible oil suspension 2500 times solution, 22.5% chlorofluoro acetamidone WP 2,000 times solution.
3, black spot, anthracnose
25% pyraclostrobin emulsion 1500 times solution, or 25% prochloraz manganese salt 1500 times solution, or 75% sputum • tebuconazole water dispersion granule 5000 times solution can be used for spray control.
4, soft rot
It can be controlled by root irrigation with 20% thiabend copper suspension 500 times or 20% thiazole zinc suspension 500 times.
5, sclerotinia
It can be sprayed with 40% pyrimethanil suspension 1000 times solution, or 50% iprodione wettable powder 1000 times solution, or 43% tebuconazole suspension agent 5000 times solution.
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