How to treat leaf diseases of Chinese yam? Detailed explanation of control methods
Chinese yam mostly grows in the shady mountainous areas, can be used as medicine, and tastes very good. It is planted in most parts of China, so how to treat leaf diseases of Chinese yam?
How to treat leaf diseases of Chinese yam?
For different types of damage, the control methods are different. For example:
1. Anthracnose
(1) Chemical control: choose Trichoderma harzianum leaf-type 300 times solution for foliar spraying, combined with soil irrigation and drenching of Trichoderma harzianum leaf-type for prevention; after the disease occurs, spray 12% copper abietate 800 times solution on the leaves, spraying once every 7 days, 2-3 times in total.
(2) Agricultural control: implement crop rotation of more than 2 years in diseased plots; after harvest, remove diseased residues, burn them in a centralized manner, and deeply plow the soil; adopt high trellis management, reasonable close planting, and improve the field microclimate; strengthen field management, timely intertillage and weeding, loosen the soil and drain waterlogging; rational fertilization, mainly with decomposed organic fertilizer, cultivate strong seedlings, and enhance plant disease resistance.
2. Phytophthora blight
(1) Chemical control: choose Trichoderma harzianum leaf-type 300 times solution or 12% copper abietate 800 times solution for foliar spraying, with prevention as the main approach.
(2) Agricultural control: choose plots with higher terrain and good ventilation for planting. Design the bed direction according to local conditions, pay attention not to plant too densely, and avoid shading between plants and rows; manage fertilizer and water well to prevent premature aging of plants; on cloudy and rainy days, clear the ditches and drain waterlogging; after harvest, promptly remove diseased residues, burn them in a centralized manner or bury them deeply, and deeply plow the soil.
3. Leaf spot
Choose Trichoderma harzianum 300 times solution, spray it directly on the diseased leaf surface, and at the same time combine it with a fumigation preparation for fumigation to effectively control leaf spot. It can be applied on cloudy days, and temperature and humidity have little effect on the efficacy. At the same time, this preparation is a biological preparation and is absolutely safe for crops, bees, and others.