Selection method of yellow powder insect

1. A light-dark separation method based on the photophobia of yellow powder insects.

Put the moving larva and the immobile pupa in the sun, cover half of the worm box with a newspaper, and the larva will immediately crawl into the dark and separate.

Second, screened out

The larva is slender and the pupa is fat and wide. If the larva is shaken slightly in a sieve of about 8 mm, the larva will leak out and separate.

3. Manual picking method suitable for separating a small amount of pupae

The advantage is that it is simple and easy, but the disadvantage is that it is time-consuming and labor-consuming. Because the pupa is too small, people will pinch the pupa and die if they make a little effort when picking.

4. the method of food attraction and the separation of insect faeces based on the immobility of insect pupae.

1. Food luring method

Put some large pieces of vegetable leaves in the insect box, the larvae will quickly climb to the vegetable leaves to feed, take out the vegetable leaves can be separated.

2. Insect fecal separation method

When the larvae and pupae are placed in a wooden box with thicker insect dung at the same time and irradiated with strong light (or sunlight), the larvae will quickly drill into the human feces, and the pupae can be separated by gently sweeping the pupae in the dustpan with a broom or brush. The above methods can also be used for the separation of dead and living insects.