Fortune Telling Collection - Ziwei fortune-telling - American Lagerstroemia speciosa has the symptoms of sooty blotch and how to prevent it?
American Lagerstroemia speciosa has the symptoms of sooty blotch and how to prevent it?
Improve and spread quickly.
Control methods: In autumn and winter, plants such as Lagerstroemia indica and bamboo should be treated with sulfur mixture, ethylicin, Chunyu 1 and so on, which need to be prepared now. It can not only kill overwintering germs, but also prevent cold and overwinter safely.
Hua Le and thiamethoxam are continuously sprayed for 2-3 times every 10 ~ 15 days to control aphids in the peak period of aphids and scale insects every year from May.
In July, while dealing with pests, fungicides such as Huamuxinzi and ethylicin were added, and Chunyu 1 was used to regulate plant nutrition and strengthen photosynthesis, which basically ensured that plants were not harmed by sooty blotch.
Fertilization management: apply more organic fertilizer, farmyard manure, phosphorus and potassium fertilizer, and less nitrogen fertilizer.
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