What about willow worms?

Willow is a kind of plant that we will plant near rivers and lakes, and its hanging willow leaves reflect each other with the scenery of lakes and mountains. There are more than 500 kinds of willows, which are widely planted in various provinces of our country, so what about willow worms in the planting process?

I. the main insect pests of willow and their control

The main leaf-eating pests of willow are diamondback moth, beetle, willow leaf beetle, etc., and the trunk borer is mainly longicorn beetle, which should be treated according to the specific types of insect pests.

The diamondback moth is the general name of Lepidoptera, which is commonly known as the spicy seed, which mainly harms the leaves of willows and generally gnaws on the leaves on the back of the leaves to form translucent patches. The older larvae can eat the leaves into many holes and holes, and when they are serious, they will eat up the leaves and affect the tree potential. The main drug treatment is to spray 1200 times of dichlorvos EC or 1000 times of 50% phoxim EC, 1000 times of 50% malathion EC, 1000 times of 25% imidophos EC, 1500 times of Ikas EC and 3000 times of Laifulin EC.

The beetle is the general name of Coleoptera. Its larva (grub) is one of the main underground pests, which is seriously harmful. The adults bite the leaves into reticular holes and lacerations, and only the main vein is left when they are serious, and the damage is even more serious when the clusters are damaged. Adults can be trapped and killed by lights, and when adults occur, they are killed by shock in the evening. In the larval stage, piercing holes in the surface, perfusion with 50% dichlorvos 500 times or 90% trichlorfon 500 times solution, the effect is good. In the adult stage, 3% permethrin microcapsule suspension or 2% thiacloprid microcapsule suspension was sprayed 500 times 600 times.

The cicada is what we usually call the autumn cicada. The larvae and adults of the cicada will cause harm to the willow. It lays eggs in the branches, so that the epidermis at the saw mouth is obliquely jagged, and the damaged branches are easy to dry up and die. The main control measures are to loosen the soil and dig out the pupa chamber to remove nymphs before the emergence of cicadas every spring. Or sprinkle the tree plate with 48% chlorpyrifos EC or 1000 times phoxim EC when the nymphs hatch from May to July. In the peak period of adult occurrence, 20% fenvalerate EC 2000-3000 times can be sprayed to kill adults.

Longicorn beetles are important forestry pests, which cause a lot of wood loss every year. The trees will be killed gradually within 3-5 years, some for a little longer. The main pesticides tested in recent years are dichlorvos, phosphamine, dimethoate, insecticidal, fenitrothion, phoxim, phoxim, dichlorvos, propoxur, omethoate, fluoroacetamide and so on.

The above are some related management methods of willow pests, in the cultivation of willow, must be more observation, early detection and control of insect pests.