Woodland pest prevention and control
According to a recent survey, the poplar leaf-eating pests in Yandu District this year are mainly moth-eaten moths, mainly Yangsaurus moths. Currently, the second-generation moths are in the 1 to 2 instar larval stage. Due to severe early droughts, it is expected that there will be local areas. Outbreak trend. In addition, there are also various degrees of occurrence of aphid pests that are dominated by anoplophora glabripennis. The prevention and control work should be carried out in a targeted manner in production so as to improve control efficiency.
Leaf pests (1) High-pressure spray. In areas with good road traffic conditions, 20% cypermethrin EC or 2.5% deltamethrin EC may be sprayed by high-pressure spraying machinery to 1000-1200 times. (2) The aerosol drug. For more than 3 rows of broad forest belts or larvae that have a good degree of coverage and insect pests are concentrated and contiguous, poplar forests can be controlled by aerosols. During the low or inactive period of pests, 4.5% beta-cypermethrin EC or 80% dichlorvos EC may be blended with diesel at a ratio of 1:5 to 10 on a sunny day at 4 o'clock in the morning or in the evening when there is no wind in the forest. medicine. (3) trunk injection. According to the size of the tree in the lower part of the trunk down to the depth of xylem inclined hole 4 to 10, each hole into 2 to 3 ml of liquid medicine. Should use strong absorption of the drug, such as 40% of lozenge EC 5 to 10 times liquid and so on. (4) Artificial control. For 1 to 3 year old young trees, leaves or worms with eggs and larvae can be removed manually during the larval incubating period to reduce the source of insects. (5) Adult insects are stalked with black light during adult emergence.
Insect pests should be carefully collected to catch adult worms, artificially hammered or hooked to kill egg larvae.
Poplar ulcer disease meaning Yang nursery can be sprayed with 50% carbendazim WP or 50% WP wettable powder 100 times liquid; forest can be sprayed on the main 50% carbendazim WP 100 times liquid , Or 70% mancozeb WP 200 times, or 70% thiophanate-methyl WP 100 times. At the same time, the management of fertilizer and water should be strengthened to enhance the disease resistance of the tree.
Leaf pests (1) High-pressure spray. In areas with good road traffic conditions, 20% cypermethrin EC or 2.5% deltamethrin EC may be sprayed by high-pressure spraying machinery to 1000-1200 times. (2) The aerosol drug. For more than 3 rows of broad forest belts or larvae that have a good degree of coverage and insect pests are concentrated and contiguous, poplar forests can be controlled by aerosols. During the low or inactive period of pests, 4.5% beta-cypermethrin EC or 80% dichlorvos EC may be blended with diesel at a ratio of 1:5 to 10 on a sunny day at 4 o'clock in the morning or in the evening when there is no wind in the forest. medicine. (3) trunk injection. According to the size of the tree in the lower part of the trunk down to the depth of xylem inclined hole 4 to 10, each hole into 2 to 3 ml of liquid medicine. Should use strong absorption of the drug, such as 40% of lozenge EC 5 to 10 times liquid and so on. (4) Artificial control. For 1 to 3 year old young trees, leaves or worms with eggs and larvae can be removed manually during the larval incubating period to reduce the source of insects. (5) Adult insects are stalked with black light during adult emergence.
Insect pests should be carefully collected to catch adult worms, artificially hammered or hooked to kill egg larvae.
Poplar ulcer disease meaning Yang nursery can be sprayed with 50% carbendazim WP or 50% WP wettable powder 100 times liquid; forest can be sprayed on the main 50% carbendazim WP 100 times liquid , Or 70% mancozeb WP 200 times, or 70% thiophanate-methyl WP 100 times. At the same time, the management of fertilizer and water should be strengthened to enhance the disease resistance of the tree.
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