Common diseases and pests of Forsythia suspensa

Diseases of Forsythia suspensa

There are actually very few diseases that affect Forsythia suspensa, the most common of which is sunburn. For this type of disease, an effective prevention and control method is to control light. While ensuring sufficient light, reduce sunlight exposure and prolonged direct sunlight, and appropriately spray water and shade the plants to avoid sunburn.

Pests of Forsythia suspensa

The main common pests of Forsythia suspensa include aphids, caterpillars, borers and snails.

Aphids and caterpillars

The prevention and control of aphids and caterpillars is mainly during the growth period of the Forsythia suspensa plant, especially when pruning the plant branches, cutting off the diseased branches in time, so as to reduce the occurrence of aphids and caterpillars. In addition, chemical treatment can also be used, which is to spray the leaves with 1000 times oxydemeton-methyl solution.

Heartworm

The borer is extremely harmful. It enters the stem of the Forsythia suspensa plant during the larval stage, which causes the Forsythia suspensa to be unable to bloom and bear fruit. In more serious cases, the entire plant will wither and die. The prevention method is to clean up fallen leaves and dead branches in time in winter to remove insect eggs, prune branches in time to deal with damaged branches and leaves, or use 500 times diluted 40% dimethoate emulsifiable concentrate or 80% DDT concentrated solution to poison the insects.

snails

Strictly speaking, snails are not pests, but they can harm flowers and larvae. The prevention method is to spread lime powder around the false forsythia for prevention and control. In addition, it can also be killed manually to reduce the harm.