Aphid pests are primarily consumed by the larvae of grasshoppers, which can cause serious damage to tree trunks or even lead to plant death. To reduce future infestations and minimize losses, it is crucial to combine winter pruning with the removal of overwintering pests. This integrated approach helps control pest populations effectively and sustainably. Beetle Damage There are three main species: Sang Tianniu, Xing Tianniu, and Bianhong Neck Tianniu. These beetles typically attack trees that are 2 to 3 years old, damaging the xylem and the central pith. The affected areas may appear normal on the surface, but there are usually a series of fecal holes arranged in a regular pattern. The insect tunnels are straight, and red-brown excrement can be seen on the ground, often resembling cotton balls. To manage this, a mixture of 80% dichlorvos emulsifiable concentrate (about 0.2 grams) or aluminum phosphide can be inserted into the last or second-to-last row of fecal holes. Afterward, all the holes should be sealed with wet mud. It's important to note that aluminum phosphide is highly toxic and must be used with caution and proper safety measures. Giardia Infestation This pest commonly affects apple and pear trees. It has a life cycle of one to two years and damages the outer skin, phloem, and cambium layers of the tree. The damaged areas may show cracks, and red mucus oozes out, which is commonly referred to as "taking the red oil." The insect creates spiral-shaped tunnels that move upward, and the tunnels are often filled with brownish worms. To treat this, mix 1 kg of kerosene with 0.1 kg of 80% dichlorvos emulsifiable concentrate and apply it directly to the infested area to kill the larvae effectively. Pear Stem Bee This pest completes its life cycle within one year. Female adults lay eggs in the phloem of young shoots in mid to late April, using their serrated ovipositor to cut the upper part of the egg-laying site. The larvae then develop in two-year-old branches and overwinter there. During winter pruning, it's essential to remove the broken branches and focus on cutting back to the third-year-old branches, which should be burned together to destroy the infestation. Grapevine Pest The grapevine borer is a major threat to grapevines. It has a one-year life cycle, and the larvae bore into young shoots, affecting the growth of the vine and the development of the fruit. After feeding on the pith, the affected branches tend to swell and form tumors. During winter pruning, it's important to remove these swollen stems and dispose of them properly. For thicker vines, 80% dichlorvos can be applied directly into the boring holes using cotton swabs to eliminate the larvae effectively. Fire Safety Water Barrier,Water Barrier,Water Filled Barriers,Garage Water Barrier Denilco Environmental technology(Suzhou)Co., Ltd. , https://www.wflood.com
Common winter fruit tree pests Pest control
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