I. Yang Ganxiang 1. Injurious characteristics: The larvae eat the phloem of the poplar, and damage the trunk cul-de-sac, cutting off the transporting tissue. The light causes the shoots to dry and the whole person is dead. Due to the formation of wormholes in wood, the value of wood is reduced. 2. Control measures 1 The density of larvae is high and the rate of worms is above 40%. When the larvae start to move, 40% omethoate EC can be used to apply a 10 cm wide medicine ring at a height of 2.5 meters. The effect is above 95%. 2 When the density of larvae is low, and insect strains are below 40%, when contaminated wood chips are seen at the victim's site, 0.1 g of aluminum phosphide particles can be put into the infiltrated holes expanded in advance, and the outside is sealed with clay and smoked and killed. Mature larvae and cockroaches. Second, the poplar wing moth 1. Damage characteristics After seedlings and saplings suffer the formation of tumor-like insects, susceptible to wind break. 2. Control measures 1 Strict seedling quarantine to prevent vaccine out of the nursery. 2 When the sap begins to flow in mid-April, use a special insect-proof cone to drill about 2 centimeters on the insect, then use aluminum phosphide to block the hole. The effect is more than 95%. 3 From mid-late June to mid-July, use 1 part of 40% omethoate EC and 1 part of 50% dichlorvos EC, and 40 parts of water to form a liquid, and apply the poplar penetrating moth to invade the hole initially. Third, Young Poplar Beetle 1. Injurious characteristics of larvae damage stems, especially the shoot tip, larvae in the phloem, xylem fistula damage. The harmed area forms a spindle-shaped tumor, which causes dry or wind-breaking branches, resulting in deformed crowns and bald heads, affecting the material. 2. Control measures 1 Strict seedling quarantine to prevent the vaccine from being sent out. 2 Clean up large trees that have been severely damaged and eliminate the source of insects. 3 Hang artificial nest wood, attract protected spotted woodpeckers and treat birds with insects. 4 Combine the artificial pruning in winter and spring, cut off the worm branches and burn them. From mid-May to late-May, about 50% of the young C. sinensis emerged, with 1 omethoate plus 1 part of dichlorvos, and 40 parts of water were painted on the main shoots and lateral branches to poison the newly hatched larvae. Fourth, the young leafhopper 1. Injury characteristics Adults cluster on the branches to spawn, the spring nymph climbed out from under the bark, causing damage to the branches and limbs, black and white, after winter and spring cold, drought and strong winds, a large number of water loss, causing young The tree loses water and even the whole plant dies. 2. Control measures 110 months before the removal of weeds, destroy eggs on the grass and adult habitat. 2 adults before the oviposition with 40% omethoate EC 1500 times plus 50% dichlorvos EC 1000 times mixed liquid, spray forest trunk and large branches, peripheral and weeds under the trees. 3 Before the adult produces overwintering eggs, brush the white paint on the trunk to prevent spawning.
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