Diseases and Pests of Weeping Begonia and Their Control

Common diseases of weeping crabapple

Begonia brown spot

Begonia brown spot is one of the most common diseases of weeping crabapple and the main reason for premature leaf drop of weeping crabapple. The disease can endanger the entire growing period of weeping crabapple.

Prevention and treatment methods

one, Maintain an appropriate planting density, do not plant too densely, and do not plant in a shady place sheltered from the wind.

two, Take timely prevention. Due to the influence of climate, prevention is generally carried out once in early to mid-April, and then every 20-30 days. In the early stage, protective fungicides are mainly applied, while in the later stage, therapeutic fungicides are mainly applied.

Begonia rust

Weeping crabapples usually develop crabapple rust in late April, which can cause the leaves to die.

Prevention and treatment methods

one, Do not plant weeping crabapples together with cypress plants to prevent the occurrence of rust cycles.

two, Generally speaking, conventional drugs for preventing and controlling crabapple brown spot disease can also treat crabapple rust disease. However, if rust disease occurs on a large scale, special-effect drugs can be used for alternating treatment. Generally, one or two consecutive uses can control the disease.

Common pests of weeping crabapple

aphid

Aphids are the main pests of weeping crabapple in early spring.

Prevention and treatment methods

The physical control method is to cut off the tender shoots where pests appear, and the chemical control method is to use 800 times diluted 5% highly effective chlorfenapyr emulsion in water, 800 times diluted 5% highly effective chlorfenapyr emulsion in water and other pesticides.

Thrips

Thrips are relatively resistant to high temperatures, so the damage is more serious in hot seasons.

Prevention and treatment methods

one, Cutting off the tender shoots can control the damage in a short time.

two, Special pesticides such as imidacloprid water dispersible concentrate, pymetrozine wettable powder, etc. can be used for prevention and control.

Web bug

Web bugs appear throughout the growing season of crabapples and are major pests in summer and autumn.

Prevention and treatment methods

Since the vitality of the web bug is relatively fragile, it can be killed by ordinary insecticides. However, if comprehensive control is required, special-effect pesticides such as highly effective chlorfenapyr emulsion and acetamiprid water dispersant can be used for prevention and control.

Red Spider

Red spider mites mainly harm the lower old leaves of weeping crabapple, causing large areas of leaves to fall off.

Prevention and treatment methods

Special-effect pesticides such as cypermethrin emulsifiable concentrate, fenbutatin emulsifiable concentrate, and triazotin wettable powder can be used for prevention and control.

This is all I have to say about the diseases, pests and prevention of weeping crabapples. You should take the right medicine for the disease and not blindly prevent and control it!