Olive hazelnuts are one of the most serious pests in the past two years, seriously affecting olive yield and quality. There may be some olive growers who have not seen the seriousness of this pest. The following is a general introduction to the harmful symptoms and control measures of the olive hazelnut wild ass.

First, the law of occurrence

The olive hazelnut wild genus Lepidoptera is a subfamily of the genus Lepidoptera, and it is produced in the Jieyang olive region for three generations a year. The generations overlap, and the old larvae or crickets overwinter on the host's dead branches. The larvae in the middle and late May were harmful to Wulan and other early-maturing olives, and the second and third generation larvae were inoculated into the fruit in July and September respectively. The fruiting rate of the fruit is about 37%, and the serious rate is as high as 92%. Fuzhou Minqing and Minhou olive areas are most seriously threatened by the rapid expansion of olives to the hard core.

Second, the symptoms of harm

After being affected by the hazelnuts, the inner pits of the olive fruits are staggered and filled with feces, causing the fruits to become dark brown, rot and fall off early; even in the case of serious, the whole tree is damaged.

Third, prevention and treatment methods

1. Do a good job in clearing the garden in winter, remove the dead branches (especially the thick branches of 0.6-0.9cm thick) and the insects, bring out the orchard for centralized treatment, destroy the wintering and phlegm, and spray the Jinmeijian 1000 times. Reduce the source of overwintering insects;

2. Reasonable close planting, strengthening pruning, repairing shady branches, weak branches, pests and branches of trees, and strengthening ventilation and light transmission conditions.

3. Physical control. Protect natural enemies while using sweet and sour liquid to trap adults.

4. Before flowering, use Jinmeijian to prevent and cure, spray once every 7-10 days, spray 1-2 times; during fruit-hanging period, use Jinmeijian to prevent and control again, spray once every 7-10 days, spray 1-2 times.

In general, the prevention and control of olives and hazelnuts should focus on prevention, and the occurrence of harmful symptoms and re-use of drugs can not compensate for the losses already caused. Due to differences in regions, varieties, climate, etc., the occurrence and control effects of olive hazelnuts will be different. The improved agents in this article are for reference only, and you must follow the expert guidance.

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