What pesticide is effective for treating cactus scale insects
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What pesticide is effective for treating cactus scale insects
Scale insects吸食 cactus juice can cause the plant to rapidly weaken, and in severe cases, the plant withers and the base joints fall off. This is usually caused by closely spaced potted plants around, leading to poor ventilation. When pests and diseases occur, it is necessary to act soon after hatching, before the larvae are encased in wax, using 50% malathion 1000 times liquid, 25% phosphamidon emulsion 800 times liquid, 40% omethoate emulsion and 80% dichlorvos emulsion mixed in 1000 times liquid for control, and repeated spraying is necessary for effectiveness.
Symptoms of cactus scale insects
Scale insects have strong resistance to pesticides and can quickly侵蚀 the leaves of cacti, appearing as dense dot-like bodies from the outside, causing the leaves to turn yellow and rot.
Damage caused by cactus scale insects
Scale insects吸食 cactus juice cause the plant to rapidly weaken, and in severe cases, the plant withers and the base joints fall off. Even if the insect bodies are scraped off, the affected areas are left with unsightly yellowish-white marks, affecting their ornamental value.
Causes of cactus scale insects
The general cause of cactus scale insects is the close placement of surrounding potted plants, poor ventilation, the presence of weeds and dead branches around, or the spread of scale insects from other surrounding potted plants to the cactus.
Effective pesticide for treating cactus scale insects
It is necessary to act soon after hatching, before the larvae are encased in wax, using 50% malathion 1000 times liquid, 25% phosphamidon emulsion 800 times liquid, 40% omethoate emulsion and 80% dichlorvos emulsion mixed in 1000 times liquid for control, and repeated spraying is necessary for effectiveness.
Methods for controlling cactus scale insects
Cactus scale insects can be treated. If there are a large number of scale insects, it is necessary to use pesticides to kill them. Because they have a waxy shell, many common pesticides have little effect on them. Specialized pesticides for killing scale insects, such as "Scale Insect Must Die," can be diluted with water and sprayed on the affected areas. Some should also be sprayed in the potting soil to prevent the eggs from multiplying in the soil.
Methods for dealing with scale insects
Cactus scale insects can be removed using a toothbrush to scrape the damaged areas of the cactus leaves. After removing the cactus plant from the pot, it should be disinfected and treated, then replanted. Care should be taken in a well-ventilated, shaded area to allow the leaves to recover.
Preventive measures for scale insects
The cultivation area should be kept clean, with weeds and dead branches removed promptly and proper ventilation ensured. If scale insects are found on trees around greenhouses, they should be sprayed with pesticides or the infested branches removed to prevent the spread to the greenhouse. If a small number of scale insects are found, they can be scraped off with a bamboo strip, or branches with many insects can be cut off and destroyed.
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