1) Coffee Tiger Tianni Coffee Tiger Tianniu occurs one generation a year. The newly hatched larvae first eat on the surface of the xylem. When the larvae reach 3 mm, they feed on the xylem longitudinally and form a meandering zigzag. The bore is filled with sawdust and insects. The excrement is very hard, and there is no excrement hole on the trunk surface, so it is difficult to find, and at this time the chemical control does not work.
Control methods: 1 In the April-May period, adult insects and newly hatched larvae were treated with 80% dichlorvos emulsion 1000 times in the adult stage and the larvae incubating stage. In the sunny days with temperatures above 25°C in the months of 27-August, releasing the Tianniao swollen bees in the field has a good control effect.
2. Leopard-printed wood moths occur once a year in Shandong, and the larvae invade from the branches or shoots after hatching. After 3-5 days, the damaged shoots are withered. The larvae grow to 3-5 mm and then drain from the inhalation holes. Dung worms are easy to find and have the habit of transforming strains. The larvae bite in a circle between the xylem and the phloem, causing the branches to break easily in the wind. There are often several rows of excrement holes on the side of the injured branches. The excrement is long cylindrical, yellowish, and there are dead branches from September to October.
Control methods: (1) Clean up the flower piers in time, and after harvesting the flowers, we must combine pruning between late July and early August to cut out the worm branches. If the pruning is too late, the larvae will cut into the lower coarse branches and cut the branches again. Has influence on the growth momentum of the flower pier. In the middle and late of the month of 27th, the larval hatching period is the appropriate period for chemical control, with 40% omethoate EC 1500 times, and 0.3-0.5% kerosene is added to promote penetration of the liquid into the branches and can be received well. Control effect.
3. The dried wood cocoon moths occur one generation in two years and span over three years. After hatching, the larvae colonize the old subcutaneous honeysuckle. The growth gradually spreads after being grown to 10-15 mm. The constant head is harmed from the lower part of the main rod and the rhizosphere into the phloem and the shallow xylem. It forms a broad insect path and emits a large amount of insect feces. And sawdust seriously damages the plant's physiological function and hinders the transmission of plant nutrients and water, resulting in yellowing and shedding of honeysuckle leaves, and flowering branches from August to September.
Control methods: (1) Strengthen the management of the field, and the larvae of Hibiscus coerulea will harm the weak flower piers, and most of the larvae will enter the old holes. Therefore, strengthening tending management, timely fertilization, watering, and promote the growth of honeysuckle robust, improve insect resistance. 2 Pharmacy control, July larvae hatching period, with 40% omethoate 1000 times plus 0.5% kerosene, sprayed on the branches, or with 40% omethoate or killing pine drugs: water = 1:1 ratio Water is poured into the roots of the medicinal liquid, that is, a hole is dug around the flower pier, and the depth is 10-15 cm. Each pier is filled with about 20 ml, and the size of the flower pier is appropriately increased or decreased, and then the soil is compacted. Due to the high concentration of the drug solution, care must be taken when using it.
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