Occurrence

The rainfall is abundant and the soil is excavated early. July-August larvae hatch and damage fruit trees.

Prevention technology

Agricultural control measures: Before the planting, more land should be planted and picking up the body; the organic fertilizer applied to the orchard must be fully decomposed; deep plowing and deep plowing should be performed before entering the winter; flooding should be conducted before the winter, and flooding is not tolerable to flooding; use of suspended animation Sex kills adults. In the evening, under the tree, a plastic film is spread and the tree is shaken. The beetle falls on the plastic film and is quickly collected and killed.

Use of tactical traps: Use their phototaxis to install insecticidal lamps. An insecticidal lamp has a range of 80 to 100 meters and an effective area of ​​20 to 30 acres. Using its chemotaxis of sweet and sour liquid, a sweet and sour liquid bowl is set in the orchard for culling. The formula of sweet and sour liquid is 1 part of brown sugar, 2 parts of vinegar, 10 parts of water, 0.4 parts of wine and 0.1 part of trichlorfon. Be careful to cover it when it rains.

Chemical control: Chafers like to eat poplar leaves. With a leaf branch about 60 cm long, about 10 cm in diameter from the end of a small bar, in 50% phoxim or 90% dipterex 100 times soak for 2 to 3 hours, hung in 1.5 meters long On wooden sticks, scattered in the evening around the orchard and fruit trees. Before the adult was excavated, the soil was treated with 25% phoxim capsule suspension 100 times.

Biological control: Use Bacillus thuringiensis or Beauveria bassiana to irrigate or spray; protect natural enemies. Spotted magpies, magpies, crows, frogs, and crickets are the natural enemies of beetles.

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