How to prevent and control pests and diseases of Atractylodes macrocephala? Detailed explanation of planting prevention and control methods
How to prevent and control pests and diseases of Atractylodes macrocephala? Please introduce the prevention and control methods. Common diseases of Atractylodes macrocephala include: 1. Southern blight. This disease mainly affects the rhizome of Atractylodes macrocephala. In the early stage of the disease, there are no obvious symptoms on the aboveground part. Later, as temperature and humidity rise, the mycelium breaks through the soil surface, and white mycelium densely covers the rhizome and the surrounding soil surface. The top of the affected plant...
How to prevent and control pests and diseases of Atractylodes macrocephala? Please introduce the prevention and control methodsCommon diseases of Atractylodes macrocephala include:
1. Southern blight. This disease mainly affects the rhizome of Atractylodes macrocephala. In the early stage of the disease, there are no obvious symptoms on the aboveground part. Later, as temperature and humidity rise, the mycelium breaks through the soil surface, and white mycelium densely covers the rhizome and the surrounding soil surface. The top of the affected plant wilts and droops, and finally the whole plant dies. Soil and Atractylodes macrocephala residues are important sources of infection for this disease. During the disease period, the mycelium spreads, and sclerotia are spread by water flow for secondary infection. The disease begins in late April and can occur until September. The peak period is from early June to early August during hot and humid seasons.
2. Root rot. This disease is a vascular system infection. In the early stage, individual lateral roots and fibrous roots turn brown and dry-rot, then spread to the rhizome and aboveground parts, causing the rhizome to dry-rot and the branches and leaves to wilt. Soil and diseased residues of Atractylodes macrocephala are the main primary infection sources. Frequent activity of underground pests aggravates the occurrence of this disease. The disease occurs at temperatures of 22°C to 28°C and relative humidity of 80% to 90%. It begins in mid-April, and the peak period is from June to July.
3. Iron leaf disease. This disease mainly affects leaves, starting from the basal leaves and gradually spreading upward. In the early stage, yellow-green small spots appear on the leaves. Later, the spots expand and connect into large iron-black patches, quickly covering the entire leaf. Diseased residues are the primary infection source. It generally begins from late April to early May, with the peak period from June to August. The disease develops fastest around the time of bud removal.
Prevention and control methods for Atractylodes macrocephala diseases:Comprehensive measures should be taken for prevention and control. ① Every year when planting, be sure to use trichloroisocyanuric acid for soil disinfection. ② In the early stage of the disease, use 50 grams of premium Wanjiafeng (copper abietate) per mu plus Zhixin Qifeng (imported multi-element foliar fertilizer) and spray the stem base to control further occurrence of the disease. ③ Southern blight is likely to occur from May to early July and from early September to mid-October, especially in hot, stuffy, rainy and humid weather. Check the field and if wilted plants are found with white material at the stem base, immediately pull out the diseased plants, spread lime, and spray the stem base with Zhixin 101 or Keshade (cupric hydroxide) 800-fold solution per mu plus 50 grams of premium Wanjiafeng (copper abietate) plus Guofeng (high-potassium foliar fertilizer). ④ From early June to early September, root rot, iron leaf disease and damping-off are likely to occur. Immediately after bud removal, carry out chemical control by spraying the whole plant with 40 milliliters of 72.2% Pumeite aqueous solution per mu plus 35 grams of trichloroisocyanuric acid plus high-potassium fertilizer mixed with water. Apply once every 10 days for 3 consecutive times.
The main insect pests of Atractylodes macrocephala include underground pests such as white grubs, black cutworms and mole crickets.
Prevention and control methods: Mix 1.5 kilograms of 50% phoxim emulsifiable concentrate or 48% chlorpyrifos emulsifiable concentrate with poisoned soil and broadcast it; from emergence to harvest, according to the degree of aphid occurrence, spray 60 milliliters of 0.36% matrine aqueous solution per mu or 3% Shayawang (acetamiprid) 1000-fold solution.
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