Main Diseases and insect pests of Atractylodes macrocephala Koidz and their Control techniques

In the planting and production of Atractylodes macrocephala Koidz, soil, technical planting, fertilizer and carrying bacteria of diseased body are the root causes of the disease. Therefore, the treatment of diseases of Atractylodes macrocephala Koidz must adhere to the policy of "prevention first, prevention is more important than treatment, and comprehensive control". On the basis of actively carrying out soil disinfection and seed and technical planting treatment, we should strengthen field cultivation management and improve plant disease resistance. reduce the occurrence of the disease, once the disease occurs in time to use chemicals to block the disease center, control the spread and spread of bacteria, and minimize or recover the losses caused by the disease. At the same time, corresponding measures should be taken to control the main insect pests of Atractylodes macrocephala Koidz, so as to avoid the loss caused by accelerating the spread of diseases and direct damage.

I. Agricultural prevention and control

Reasonable rotation is not suitable for continuous cropping with cabbage, scrofula, peanut, peony, Rehmannia glutinosa, aconite, sweet potato, tobacco, Solanaceae and other Compositae crops. Rotation with corn, sorghum, rice and other Gramineae crops for more than 4 years.

Seed treatment was treated with 50% carbendazim equivalent to 0.5% seed weight or 0.3% dimethazone wettable powder.

Soil disinfection nursery land and cultivated land 667m2 sprinkled with 50% 75 kg quicklime before ploughing fine (alkaline soil is not suitable). Before sowing or transplanting, 50% carbendazim wettable powder 2.5kg per 667m2 or Trichoderma preparation 10~15g/m2 was used to make soil and spread evenly throughout the field.

Before disinfection and planting, 50% carbendazim wettable powder can be used to soak the 10~15min or 70% Velda metoprolol wettable powder 1000 times to soak the 3~5min, remove it to dry and then plant; it can also be impregnated and disinfected with Bordeaux solution of 1, 1, 1, 150.

Timely planting and sowing should be carried out from late March to early April. The transplanting time is from late November to late January of the following year.

Properly sparsely planted basic seedlings per mu should be controlled at 10,000 plants.

Strengthen management

II. Chemical control

1. White silk disease: at the initial stage of the disease, the disease area was irrigated with 50% carbendazim wettable powder or 70% Velda metoprolol wettable powder 500 / 1000 times, or sprayed with 50% carbendazim wettable powder 1000 times, or 20% Xianbao wettable powder 1000 times.

2. Rhizoctonia solani: in the early stage of the disease, you can use 50% Likujing wettable powder 800 × 1000 times, or 20% methyl richos EC 1000 times, or 80% Dasheng Mashi 45 wettable powder 600 times 800 times, or 72.2% Prike water agent 500x spray.

3. Root rot: remove the central diseased plant in time at the initial stage of the disease, and irrigate the disease point and surrounding plants with 50% carbendazim wettable powder or 500-1000 times solution of 70% Vildarin wettable powder, etc., or spray prevention and control with 1000 times solution of 3% Kekangkang wettable powder or 98% Lujia198 wettable powder 1000 times.

4. Spot blight: spray control at the initial stage of the disease, such as 1 100x Bordeaux solution, or 50% acetaminophen wettable powder 800x solution, or 70% Vilda metoprolol wettable powder 500x solution, or 50% prohydantoin wettable powder 500x solution, or 75% chlorothalonil wettable powder 300g 500x solution, every 7~10d1, 2 times continuously.

5. Rust: spray prevention and control of rust at the initial stage of the disease, such as Bordeaux solution of 1 300 times, or 62.25% Xiansheng wettable powder 600x, or 10% high water dispersible granules 1000~l500 times, or 15% triadimefon wettable powder 1000 times, once every 7 to 10 days, 2 times in a row.

6. control of Atractylodes macrocephala aphid: when the occurrence of Atractylodes macrocephala aphid is the strongest from April to June, 50% dichlorvos 1500 times liquid or 2.5% fish rattan essence 600 times 800 times solution plus a small amount of neutral soap can be used to spray 50% dichlorvos 1500 times solution when the larvae of Atractylodes macrocephala are fed in September. Small land tiger in the middle of April to late May is the peak period, with fried bran 15kg and 90% trichlorfon appropriate amount, add water 15kg to make poison erbium trap, or combined with topdressing, Lycoris bulb washed and mashed, in each load of dung water into 3~4kg treatment.