This moth seriously harms the large-leaf boxwood, and these two points are the key to control

The large-leaved boxwood spotted moth is one of the common pests of boxwood plants, feeding on the host leaves with larvae, and when severe, the leaves will be eaten light, affecting the normal growth of plants. It mainly harms a variety of plants such as large-leaf boxwood, silver-edged boxwood, golden heart holly spear, large flower guard spear, fufang vine and silk cotton, and its control measures are indispensable.

【1】Morphological characteristics:

1. Adult: flat and round, black back, long yellow hairs on the back of the chest and abdomen, yellow on the abdomen. The forewings are pale greyish-black, slightly transparent, with a base 1/3 light yellow. The hindwings are half the size of the forewings and are slightly paler.

2. Egg: oval.

3. Larvae: The body length is about 15 mm when mature, the abdomen is yellow-green, and there are ∧-shaped black markings on the dorsal plate of the forebreast. There are 7 longitudinal bands on the back of the body, and there are hairs and short hairs on the surface of the body.

4. Pupa: yellow-brown, with 7 inconspicuous longitudinal stripes on the surface and 2 gluteal spines.

【2】Occurrence law:

One generation occurs a year in East China. From the end of March to the beginning of April of the following year, the eggs hatch, the larvae have a habit of clustering, and the larvae mature from the end of April to the beginning of May, form cocoons in the shallow soil and pupate, and pupate over the summer. In early November, the adults feather and lay eggs after mating, where they lay on the branches and overwinter with their eggs.

【3】Prevention and control methods:

1. Artificial prevention: Because the overwintering eggs are mostly attached to the top of the fresh branches of the year, the green belt can be combined with pruning before winter every year to prevent and remove, cut off the branches with eggs, and eliminate the eggs.

2. Pharmaceutical control: use a net dilution of 800-1000 times the liquid of the Qilin tree insects for uniform spray control.