The main insect pests of orchids

1. Shell worms. There are many species, and it is also the most common pest. The ones that harm orchids are yellow scale, orchid scale and thorn-like scale, which all belong to Homoptera and Coccidae. The shell of the female adult is long oval or nearly round, brownish yellow or white. It absorbs juice from the petiole, leaf base, and even the leaf surface of adults and nymphs, causing growth setbacks and macular formation. In the environment of poor ventilation and excessive water humidity, the reproductive harm of scale insects is especially serious, so it is necessary to improve environmental conditions and ensure ventilation, which is a preventive measure. It is found that a small amount of shell insects (visible to the naked eye) can be gently removed with toothpicks and can be sprayed when the amount is large. Larvae and nymphs are intended to be sprayed with dimethoate 1000 times once, and adults are sprayed twice with methotrexate.

two。 Thrips. Mosses Lantanoptera, thrips pests, it lays eggs on flower buds (buds), nymphs and adults on flowers and flowers to absorb juice, so that the flowers open to disability, or even the whole grass flowers can not come out, which is particularly common in the flowering of Jian Lan from June to September. Prevention and treatment: a small amount of it can be pinched by hand or rinsed with soapy water. Generally, it can be prevented by spraying 800ml 1000 times dimethoate when arranging the bell.

3. Aphids. Aphids are commonly known as /, there are many kinds of aphids and they multiply quickly. Can parthenogenesis, is the crop, horticultural flower aphids, but also can harm orchids, common peach aphids, cotton aphids, black aphids and so on. Aphids often harm tender leaves and buds in groups, sucking juice with nymphs and adults, and some aphids have wings that can fly, so it is a major way to spread the virus. once it is found to be used for drug control, it will be sprayed 1500 times with omethoate.

4. Red spiders, mites. It is mainly harmful to the leaves, so that the white spots on the upper and lower parts of the leaves lose their luster. It is planned to examine them in April-May, spray trichloropropofol 800-100 times, or spray omethoate in summer and autumn.

5. Ants, snails, earthworms and other small animals can be trapped and killed by poison feeding, or scattered around the basin with furan Dan. (Hong Liming)