Control of the greenhouse green asparagus underground pest Golden needle worm
Golden needle worms belong to the order Coleoptera, kowtows. Adult insects are commonly known as kowtows, and larvae are also known as copper filaria, truncated insects and so on. There are two main types of golden needle worms that harm asparagus: groove golden needle worm and fine chest golden needle worm.
Pest characteristics: Larvae bite the rhizomes of poultry seedlings in the soil and the young stems in harvesting, which seriously affects the yield, quality and seedling growth of asparagus.
Occurrence pattern: 2-3 years occurs in a generation, with adults and larvae overwintering in the soil. Wintering adults are active from mid-March to mid-April, lurking in the topsoil during the day, and are unearthed to mate and lay eggs. The larvae begin to move in mid-March and are most severe in early to mid-April. When the soil temperature of 10 cm reaches above 28 °C in June, the golden needle worm dives down to the deep soil layer for more summer. From late September to early October, when the soil temperature drops to about 18 °C, the larvae rise to another 1 to the topsoil layer activity,
Control methods: The agents used to control the scorpion are suitable for golden needle worms. It can be combined with 3.6% tee granules, 3% octyl thion granules, 2.5% dimethoate powder, etc., and can also be controlled by irrigating roots such as 1.8% avermectin emulsion 2000-3000 times liquid.
Control of the greenhouse green asparagus underground pest slug