Why did the cuckoo lose its leaves?
There are about ten reasons why rhododendrons lose their leaves due to disease: ▲ hypertrophy, burning roots and dry tips. The ▲ floods the roots and leaves. ▲ overcooled or overheated water ▲ soil is alkaline and hardened. ▲ suffers from black spot disease with high humidity. ▲ red spider disease. There is a tumor at the edge of the lobe of ▲. ▲ leaves the room too early, too late, or poorly ventilated. ▲ is too dry. ▲ is damaged by paint or other toxic fumes.
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What if there are worms on the back of cuckoo leaves?
(1) red spider. The individual is very small, the body length is generally about 0.3 mm, it is difficult to see clearly with the naked eye, observation needs the help of a magnifying glass. Red body, often gathered on the back of the leaves, mainly absorb the sap of the plant, and make the leaves appear gray-white spots. In serious cases, the leaves turn yellow and fall off, the growth of new shoots is poor, and the tree potential is weakened. Red spiders produce 10 generations a year, and the harm is particularly serious in high temperature and drought from June to August, but less harmful in heavy rain and rainy weather. Litter should be removed in winter to eliminate overwintering adults.
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Rhododendron net bug
Cuckoo net bug, also known as cuckoo army with worms, smelly sister. The adult body is about 3.5 mm long, dark brown, the wings are covered with reticulate whiskers, the forewings are slightly rectangular, when still, and the dark brown markings on the wings form an "X" shape. The nymph is similar to an adult, but the body is tender and wingless, about 2 mm long, the egg is 0.6 mm long, oval, milky white, produced in the midrib and larger leaf veins, light green at first birth, and then yellowish. There are three to four generations a year, and adults overwinter in bark and land crevices in mid-late October, and in the second year.
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