Poplar common pest control

Poplar wood pests mainly include leaf-feeding pests, sucking-type pests and borers. The prevention and control methods for the main pests of poplar trees in our district are described as follows: 1. Leaf-feeding pests. It is mainly found in Yangsmocarpus moths, S. sinensis moths, and S. moths (commonly known as yang fuzi). Poplars are harmed by the above-mentioned pests from the seedling stage to the harvested stage, causing leaf defects or loss of food. Young trees (1 to 4 years old) are affected by poplars and have a greater impact on growth and survival. Control methods: 1, manual control. Combine forest management such as pruning, pruning, and weeding, and manually kill crickets and nests. Adults have phototaxis (May to October) and can be trapped by light. 2, chemical control. The larvae are in danger (from June to September), and dimethoate or 80% of dichlorvos 1000 times spray is generally used for prevention and treatment. It is also possible to use the trunk of “Paul Lin 3” for prevention and treatment. Second, sucking pests. The main thing is grass. In the early spring, grass twigs sucked up tree shoots and twig juice, causing the whole plant to die. Therefore, control of grass worms should be selected before the nymphs in early spring. Control methods: 1, manual control. Put a plastic sheet or a plastic tape around the trunk to block the tree. Before the nymph on the tree (in the middle and early February), a plastic sheet (a new plastic sheet) with a width of about 20 cm is preferably tied to the bottom of the trunk or wrapped with tape at the bottom of the trunk with two stringers, and the blocking rate can reach over 98%. Assist with manual culling, the effect is more obvious. 2, chemical control. 1 meter below the trunk with waste oil plus organophosphorus pesticides ring coated with a 10 cm wide ring to prevent grass hoe to climb the tree or touch the drug to kill. If it is on the tree, 50% of dichlorvos or dimethoate can be sprayed and sprayed for 1000 times. Third, borers pests. There are mainly Sang Tianniu, Anoplophora glabripennis, and Cloudbill Tianniu. During the larval period, there was a clear hole in the trunk and wood chips were exposed. Control methods: 1, forest management measures. This is a preventive measure to avoid the occurrence of forest disasters by adjusting the forest species structure. If poplars cannot be mixed with mulberry, poplars are prone to mulberry. 2, quarantine measures. Quarantine is an effective means of preventing and spreading the spread of natural calf. All seedlings, timber and packing boxes from the affected area must be quarantined and transported afterwards. 3, manual control. The severely damaged trees were cut off, the large branches withered by the pests were cut off, and the insects were removed in time. In the adult spawning period, inspect the groove on the trunk (mostly in branches and branch bifurcations) and kill the eggs or larvae above the groove with a small hammer. During the adult period, the trunk is shaken, shaken off the adult and killed. 4, chemical control. Find the freshest evacuation hole and inject a mixture of dichlorvos stock solution and diesel oil into the boring hole and block the boring hole with wet mud. Zinc phosphide poisoning can also be used to insert the first hole in the base of the trunk and one hole in the upper part, and the other holes are sealed with wet mud.

Nervous System

Spinal Cord Model,Human Spinal Model,Spinal Marrow Model

Hongrui Medical Devices Co., Ltd. , http://www.zzcprtrainingmodel.com