Control of Diseases and insect pests of Fritillaria thunbergii

Pleonomus canalieulatesFalder., which is called "kowtow worm", is one of the underground pests that harm Fritillaria thunbergii.

The body of the golden needle worm is flat, leathery, needle-like, the tail bifurcates and bends upward slightly, and there is a longitudinal groove in the middle of the back of the body, so it is called the golden needle worm. Golden needle worms endanger bulbs in the soil, and holes about 0.2 cm in size are common in the scales.

The life history of the ditch needle worm is very long, and it takes about 3 years to complete a generation. The larval period is the longest, and its activity is greatly affected by soil temperature and humidity. when the temperature decreases in winter, it will drill into the soil below 30 cm or even deeper to overwinter; the time of rising activity and damage in spring is earlier than that of other underground pests, and generally begins to rise when the soil temperature reaches 6 ℃ in early spring, harming Zhejiang shellfish.

Control methods: change the living conditions of underground pests, turn the pests out of the soil and die under the influence of natural enemies and natural environment. When the golden needle worm pupates, the pupa chamber is destroyed, which can cause a large number of deaths.