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Two kinds of pest control of Schisandra
(1) Leaf blight typically starts at the tip or edge of the leaf and gradually spreads across the entire surface. Infected leaves turn yellow, become brittle, and eventually fall off. In severe cases, the disease can also lead to premature shedding of the fruit.
To manage this disease, it's important to maintain good field practices, such as ensuring proper ventilation and sunlight penetration. Early intervention is crucial. When symptoms first appear, apply a 1:1:100 Bordeaux mixture, repeating the application every seven days for several consecutive times to effectively control the spread.
(2) Roller leaf larvae are a common pest that causes leaves to curl or roll, which hinders normal growth and can even result in fruit drop. These pests feed on the leaves, reducing photosynthesis and overall plant health.
For effective control, spray the affected areas with one of the following insecticides: 50% phoxim diluted 1,500 times, 50% phosphoamine diluted 1,500 times, 40% dimethoate diluted 1,000 times, or 80% trichlorfon diluted 1,500 times. It’s recommended to follow the instructions carefully and consider rotating pesticides to prevent resistance development. Regular monitoring of the crop is essential to detect infestations early and take timely action.