How to control orchid nematodes and matters needing attention in replenishing water with edible fungi

Nematodes, also known as worms, parasitic on plants are smaller and shorter than 1mm. The female nematode is pear-shaped and the male is linear, parasitic on the roots, leaves, buds and flowers of plants and is often damaged in low-temperature and dry seasons. The most common nematode diseases in orchids are national orchid risk nematode disease, shrimp ridge orchid root-knot nematode disease and Wandai orchid yellow bud blight (important damage inflorescence and commercial flowers). The beneficial leaves are covered with yellow or brown patches, causing bad death, luxuriant and even fallen leaves; the beneficial roots form beaded nodules or nodules, such as rice grains and large ones such as pearls, and the white sticky substance in the tumor is the worm body and eggs; the beneficial flower buds dry up and cannot form buds.

The key point of prevention and treatment is to remove the diseased plants or diseased parts, which need to be soaked in 50 ℃ 55 min hot water for 10 minutes. Because nematodes spend the winter in soil, disinfection of soil is also very important. 1000 times of omethoate or 80% dibromochloropropane can be used. (EC) 100ml 200 times liquid irrigate the soil. If the soil is spread in the air (thickness 8-10cm), it can also kill nematodes after sunlight exposure and boredom for 30 days.