[Harmful symptoms]
Adults and nymphs suck on young shoots and fruit juice. The surface of the injured fruit is uneven, the victim becomes hard, the taste is bitter, or the pulp is bolized, and the wound often has glue droplets overflowing.
[Prevention and control methods]
(1) Remove dead branches and leaves and weeds, burn them centrally, and eliminate overwintering adults. Egg mass removal and hunting of nymphs in the first incubation stage. (2) 5% high efficiency cyfcypermethrin acetamidine microemulsion 1000~1500 times liquid or 5% acetamidine emulsion 1500-2000 times.
[Morphological characteristics]
Adults are 14–16 mm long, oblate oval, pale yellowish brown to tea brown, slightly purple-red; black-brown indices on the dorsal plate, small shield, and leathery part of the forewings, 4 small yellow-brown dots across the anterior margin of the dorsal plate of the forethia, 5 small yellowish-white dots on the base of the small shield, with obvious spots on both sides; 5 antennae, white-yellow at both ends of the fourth segment and the base of the fifth segment, and others are black-brown; the beak extends to the middle of the first ventral segment, the tibial segments of the foot and hind foot are white, and the tibial segments of the midfoot and forefoot are white; and the lateral borders of the abdomen are black and yellow. The eggs are short cylindrical, about 1 mm high, with an egg cap, the lid margin is white, 18-28 grains in one piece; the initial grayish white, black brown before hatching. The initial nymph hatcher is about 1.5 mm long, nearly round, with spikes on both sides of the dorsal plate of the anterior thorax, a pale orange-yellow abdomen, a rectangular black spot between the nodes on each ventral segment, a total of 8 pairs, and a larger rectangular black spot in the middle of the back of the third, fifth and seventh segments of the abdomen.
[Life Habits]
Adult insects overwinter in house corners, eaves, tree holes, crevices and haystacks. In mid-to-late March of the following year, the overwintering adults begin to move to the orchards, feeding, mating and laying eggs, mostly on the back of the leaves. In the northern fruit area, there is generally a stinging activity in early May, and eggs are laid from early June to late August, with an egg period of 10-15 days. Nymphs appear in early July, egg hatching in mid- and late-June, and adults in mid-August. Nymphs appear in the field from early August to early October, and are also harmful citrus fruits along with adults. In mid-to-late October, adults gradually turn into overwintering. Adults are suspended dead and extremely sensitive, and if people get close to them without interfering, they have already dodged, or fled or fallen to the ground.