Ten ways to prevent silkworm disease

1. Look at population development. When collecting ants, the hatching is uneven, the size of the silkworm is uneven, the head is big and the tail is small, and there is much silk spinning, crawling around the silkworm seat, indicating that the body is weak. In the process of feeding, touch the silkworm with the hand or lift the silkworm, such as the silkworm contraction, the resistant silkworm is the healthy silkworm, which shows physical weakness without feeling. Big silkworm period, touch the silkworm with the back of the hand, feel cold for the healthy silkworm, have a sense of dampness and heat, indicating that the physique is not strong.

two。 Look at the posture before and after molting. When the healthy silkworm molts, its head and chest are held high and the skin is molted together. If do not fall asleep for a long time, after sleeping, the head and chest is flat, the tail is small; or the appearance of semi-molting or no molting is a sign of weakness or disease of the silkworm.

3. Look, eat leaves. Healthy silkworms have a normal appetite and few residual mulberries. The following back to feed leaves, silkworm plaque leftover leaves, silkworm action dull, head and chest raised, dormant in the silkworm seat or residual mulberry, mostly signs of weakness or disease.

4. Look at silkworm dung. Healthy silkworm feces are hexagonal column-shaped, black and hard. Such as silkworm dung thin and soft, different shapes or several grains connected into a string, glued to the tail, sewage secreted, mostly weak silkworms or diseased silkworms.

5. Look at the action. Before feeding the leaves, gently blow the silkworm body with the mouth. If the response is sensitive, the head and chest held high is the healthy silkworm. If the response is slow, often still, or hidden in the silkworm seat, or crawling around, for the weak silkworm or diseased silkworm.

6. Look at the body color. The body color of healthy silkworm is clean. Most of the diseased silkworms are dirty and gray, the whole body or part of the skin appears disease spots of different sizes, the abdominal feet and tail corners are scorched black, the skin is loose, wrinkled or tense and shiny, and the internode membrane loses flexibility.

7. Check the pulse. The pulse is the speed at which the dorsal vein of the silkworm beats. The pulse of diseased silkworm is slower than that of healthy silkworm under the same condition. Poisoned silkworms or quenched diseased silkworms are faster than healthy silkworms at first, then slower and uneven than healthy silkworms, until they stop completely.

8. Look, spit. Spitting is mostly diseased silkworms, some spitting a lot of water, some chest swelling a small amount of spitting, some head and chest curling spitting water.

9. Look at the plaque. Those with spots around the valve, back, head-chest junction or both sides of the tail are diseased silkworms.

10. Look at the green-headed silkworm, late-sleeping silkworm. Generally speaking, diseased silkworms appear in late-developing green-headed silkworms or late-dormant silkworms.

To observe the symptoms of the disease, we should focus on these silkworms. If the green-headed silkworms and late-sleeping silkworms have no signs of disease, it means that the whole batch of silkworms are relatively healthy; if this batch of silkworms have found the disease, a large number of silkworms should be observed in time and effective measures should be taken to prevent and cure them. When a small number of diseased silkworms appear in the population, the disinfected silkworms should be disinfected; if there are a large number of diseased silkworms, they should be isolated and eliminated in time, and different kinds of diseased silkworms should be treated with pesticides.