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1, the law of occurrence: a generation of many generations, with nymphs in the soil or eggs in the host stems overwintering, nymphs sucking plant roots in the soil, in August for the spawning period, often causing the branches to die.
2. Control methods: 1 Combine the winter pruning shears with the destruction of egg branches.
2 Manually capture adults.
aphid
1. Regularity of Occurrence: Occurrence of 10-30 generations in a year, wintering in the branches, buds and cracks in the bark, etc., beginning in mid-March, and severely in April and May.
2, prevention and control methods: 1 combined with winter pruning scissors have egg branches.
2 Use yellow viscose board to induce sticky wings.
3 In the initial incubation period and before spawning, it can be sprayed with insecticides such as chlorfenapyr, dichlorfon, etc.
Scale insects
1, the law of occurrence: the occurrence of 1-4 generations a year, with the female in the wax shell winter, in the branches, leaves can be parasitic, resulting in weakening tree vigor, poor growth, severe disease when the whole plant withered. The degree of canopy closure is large, and poor ventilation and light transmission occur seriously.
2. Control methods: 1 Manually scrape the stem body and wax shell.
2 strengthen management, proper trimming, increase ventilation and transparency, reduce the chance of occurrence.
3 Even if the cut off pests are destroyed.
4 In the nymph larvae during the new hatching period, sprayed with flower protection, chlorfenapyr, peony and other chemical agents.
5 weeks open groove furazolid and other systemic agents to prevent and treat.
Tea moth
1, the law of occurrence: 2-3 generations a year, with 3-4 instar larvae in the protective bag overwintering, the end of June to early July the first generation of larvae began to harm, in September the second generation of larvae damage.
2, control methods: 1 manual removal of protective sac.
2 Use black light to trap adult insects.
3 larvae spraying diflubenzuron, diflubenzuron, nicotine, crystal trichlorfon and other agents control.
Tea moth
1, the law of occurrence: 2-3 generations a year, with 3-4 instar larvae in the protective bag overwintering, the end of June to early July the first generation of larvae began to harm, in September the second generation of larvae damage.
2, control methods: 1 manual removal of protective sac.
2 Use black light to trap adult insects.
3 larvae spraying diflubenzuron, diflubenzuron, nicotine, crystal trichlorfon and other agents control.
Yellow belly moth
1, the law of occurrence: the occurrence of 2 generations a year, with quail in the soil and under the layer of litter. Spawning period is long and there are overlapping generations. From May to May, the larvae are harmed and adults have strong phototaxis.
2, control methods: 14-May with black light trap adult.
2 larval spraying insecticide urea, BT, trichlorfon and other agents control.
Six-pointed spotted leopard moth
1, the law of occurrence: a generation of one year old, mature larvae in the branches in the stem overwintering. The tunnel is longer and there are multiple excrement holes. After adult emergence, half of the clam shell is left in the emergence hole. Eggs are often produced in tree branches and branching branches.
2. Control methods: (1) Pruning and cutting off pests and branches, wilt branches, weak branches, and wind-breaking branches in a timely manner to cultivate strong seedlings and enhance resistance to pests and diseases.
2 Install black light traps to kill adult insects in April-May.
3 Adult spawning and larval hatching. Kill the newly hatched larvae with enemy-killed spray branches.
4Inject Beauveria bassiana infection larva from the defecation hole.
(5) Inoculate the affected trees with borehole net injection (drip), or insert aluminum phosphide tablets into the tunnel to poison the dry larvae.
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