What are the diseases and insect pests of Achyranthes bidentata?

What are the diseases and insect pests of Achyranthes bidentata? How to prevent and cure it? Please introduce the main diseases and insect pests during the growth period of Achyranthes bidentata: White rust, blackhead, nematode, caterpillar, red spider, great ape leaf worm, control methods can refer to the following Achyranthes bidentata white rust: the symptom is that all the aboveground parts of the plant can be harmed, showing that the leaves are killed, with yellowish green patches on the leaf surface, and the corresponding back grows with outstanding blister protuberances, with a diameter of 1 mm. After the epidermis is ruptured, white, glossy, sticky powder is scattered. The diseased leaves turn yellow and brown when blister spots occur for a long time. Occurs in the petiole bud and other parts, resulting in light yellow spots, and then into white blister spots, the diseased stem is often swollen and twisted. The large temperature difference between day and night and the condensation of dew are beneficial to the germination and invasion of sporangia. White rust is easy to occur in spring and autumn overcast and rainy weather and poorly drained fields. Prevention and control methods: mainly from the improvement of cultivation techniques for prevention. First, pay attention to crop rotation, deep ploughing and removal of diseased and disabled tissues. Second, in the cold and rainy season in spring, trench drainage reduces the humidity in the field. Third, from the first ten days of March, 40% ethylphosphine aluminum 200 × 300 liquid was sprayed or 50% methyl topiramate 800 × 1000 liquid, or metalaxyl, Bordeaux solution, etc., were used for chemical control. Black head disease and nematode disease of Achyranthes bidentata: blackhead disease mostly occurs in spring and summer, mainly because the cover of Reed head is too thin, which is caused by freezing injury in winter, causing blackness and mildew. The method of prevention and control is to pay attention to drainage and waterlogging and cultivate soil in winter. Nematode disease mostly occurs in low altitude areas, forming uneven sarcomas on the roots. Attention should be paid to the selection of soil in prevention and control, and the soil can be treated with 35-45 kg Didi mixture per mu. Achyranthes bidentata pests: caterpillars, red spiders, generally occur in May to June every year, serious harm when the weather is dry. Prevention and control can use Dongguo emulsion 500g plus water, 1000 kg, spray control. In addition, pay attention to weeding, but also avoid intercropping with beans, cotton and other intercropping or adjacent cropping. Achyranthes bidentata leaf worm: usually occurs in May to June, the symptom is that the worm bites the leaves into small holes. For control, it can be sprayed with 800 times of imidophos or 1000 times of trichlorfon. Click to get more planting techniques of Achyranthes bidentata