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 3 to 4 generations a year, and the adults overwinter in bark and land crevices in mid-late October, and begin to feed on the back of the leaves from April to May of the following year, and the damage is the most serious from July to August. Adult and nymph groups gather near the main veins on the back of the leaves, prick and suck the sap of the leaves, and their secretions form large yellowish-brown speckles, and in severe cases, the leaves are pale, causing early fall, affecting the growth and flowering of rhododendrons.

Prevention and control methods: (1) remove fallen leaves and weeds near flowers and trees after winter, bury or burn deeply to eliminate overwintering adults. (2) Pesticide control: in May, after the emergence of overwintering adults and the occurrence of the first generation nymphs, 80% dichlorvos EC or 50% borer pine emulsion was sprayed 1000 times, once every 7 to 10 days, 2 to 3 times continuously. 3% carbofuran can also be used to bury about 5 grams in each basin, and the effect is also very good.

Cuckoos and slugs mainly harm the roots. Sometimes slugs also harm leaves. The medium used in cultivation should be disinfected at high temperature, kill eggs, and find pests, which can be controlled by carbofuran and Tiemiake.