Tea wing bug and hemp skin bug

Tea-wing bugs and hemipterous bugs both belong to Hemiptera Pentatomidae, and they are also pests that do great harm to garden ornamental plants.

Tea wing bug

Scientific name Halyomorpha picus

Alias stinky bugs, smelly eldest sister, brown bugs

The host species has a wide diet and harms many kinds of garden plants, such as Robinia pseudoacacia, elm, fig, clove, pomegranate, paulownia, peach, begonia and so on.

Harmful adults and nymphs feed on tender leaves, tender stems and fruit juice, resulting in withered and yellow leaves, early defoliation and tree potential decline. The injured tender stopped developing slightly, and the damaged fruit was underdeveloped or stunted.

Morphological characteristics of adults: 12 mm to 16 mm in length and 6.5 mm to 9.0 mm in width. The body color and size vary greatly, from yellowish to brown, with black dots, or gold-green flash spots, or slightly golden-green luster, or gold-green on the back. The antennae are yellowish brown, the ends of section 3, the middle part of section 4 and most of section 5 are dark brown. The beak extends to the middle of the first ventral segment. The lateral lobe of the head is flush with the middle lobe, the lateral lobe is wider, and the lateral edge is at an obvious angle near the front, which bends suddenly. The front edge of the anterior chest dorsal plate extends slightly outward, the side angle is more round and obtuse, the extension is not much, the front side edge is smooth, and has a yellow-brown narrow edge. There are 5 faint yellow spots on the base edge of the shield, 2 of which are more clear. The wing is smoky brown, the base color is darker than the end, it is dark brown, and the tip wing vein is also dark. The lateral border is yellow and black, and the ventral surface is yellowish brown, yellowish brown or reddish brown, only there are some green spots near the basal ganglia of the antennae under the head and on the lateral area of the chest. There are dark spots on the legs. The claws and beak ends are black. Eggs: about 1 mm long, short cylindrical, gray-white, 24 to 28 eggs, most eggs 28, eggs neatly arranged, hexagonal. Nymph: adult-like, small and wingless, with black spots on the back of the abdomen.

One generation of living habits occurs in North China every year, overwintering as adults in haystacks and tree holes, overwintering adults come out in May, lay eggs in June, the egg period is about 7 days, and can lay eggs for 5 to 6 times. Adults and nymphs can secrete odorous liquid to defend against the enemy when they are frightened, so they are also called smelly eldest sisters.

Prevention and cure method

The main results are as follows: 1. Overwintering adults can be eliminated by artificial capture or removal of litter and weeds and concentrated burning.

2. Remove the egg block and destroy it.

3. In the early stage of nymph occurrence, spray 3000 to 4000 times of imidacloprid EC, or 4000 times of phoxim EC, 3000 times of 2.5% deltamethrin EC, or 3000 times of 2.5% Kung Fu EC before the nymphs are dispersed.

Sesame skin bug

Scientific name Rrthesina fullo

Alias yellow spot bug, bugs

Host white wax, elm, persimmon, albizzia, sycamore, peach, acacia, Robinia pseudoacacia, paulownia, cherry blossom, begonia and other garden plants.

Harmful adults and nymphs absorb the sap of leaves, tender stem tips and young fruits, affecting the normal growth of garden plants.

Morphological characteristics of adults: 18 mm to 23 mm in length and 10 mm in width. Black, densely dotted, and with fine irregular maculae. The antennae are black, the base of the distal segment, the middle part of the abdominal segment and the middle part of the tibial segment are yellow. There is a yellow thin middle longitudinal line from the end of the head to the base of the shield. The head is long, the lateral leaf is flush with the end of the middle lobe, and the end of the lateral leaf is narrowly pointed, making the lateral margin at an angle. The beak extends slender to the middle of the third ventral segment. The anterior margin of the anterior thoracic dorsal plate is slightly serrated. There is a concave longitudinal groove in the center of the abdomen. The tibial segment of the forefoot widened and slightly enlarged into a leafy shape. Eggs: oblong, bright, egg height 2.2 mm, thick 1.5 mm, pseudotectum 1.2 mm in diameter. The egg mass is usually 12, arranged in four rows. The eggs are laid on the back of the leaves of the host plant. The first eggs are light green and dark yellow when they are nearly hatched. Nymph: the first hatched nymph surrounds the periphery of the egg mass. There are many yellow and black horizontal lines in the chest and abdomen of the early nymph.

Living habits occur one generation a year in North China, and adults overwinter in the cracks in the wall and bark on the sunny side, and the damage begins from late April to early May. The nymph begins to lay eggs in late May, and the adults overwinter one after another after the end of August. Control method: the same tea wing bug.