CATDOLL : CATDOLL: A large number of skin beetle larvae appear in the breeding of yellow mealworms. How to remove the skin beetles without harming the yellow mealworms?

1. A large number of skin beetle larvae appear in the breeding of yellow mealworms. How to remove the skin beetles without harming the yellow mealworms?

Quarantine and prevention measures

1. Quarantine treatment. It is strictly forbidden to bring goods with this insect into the country to prevent it from being introduced. Once it is found, effective measures should be taken to quickly and thoroughly eliminate it. The general method of elimination is mainly fumigation. Commonly used fumigants are (1) Phosphine: To kill eggs, at 20℃, 0.7g/m2 (CT value is 50g.h/m3) is required, and fumigation is carried out for 3 days; at 30℃, the CT value is 22.6h/m3, and fumigation is carried out for 2 days. To kill larvae, the CT value needs to reach 75g.h/m3, and fumigation is required for 5 days. (2) Methyl bromide: At 25℃, the dosage is 80g/m3, and fumigation is carried out for 48 hours; at 10℃, the dosage is 3 times that at 25℃. When there is no condition for fumigation and disinfection in warehouses and transportation vehicles, Marathon can be sprayed. Generally, 20g of 30% wettable powder is used, 4.5kg of water is added, and 80m2 is sprayed. Before spraying, the cleaning work must be done thoroughly, and special attention should be paid to gaps and holes when spraying.

2. Mix the sex pheromones of Trogoderma granarium with insecticide, put it in a container, and place it at the infected and occurring sites. This can be used as a means of detection and can also be used to lure and kill adult insects.

3. A parasite, the Trogoderma beetle, is used for biological control abroad. This parasite can parasitize several species of Trogoderma beetles. The trapped males are infected with the Trogoderma beetle and then, when they return to their habitat, they infect the females through mating, thus suppressing their population.

4. The female Trogoderma granarium beetle releases a collective incense that can attract both male and female insects. This collective incense is a mixture of 5 lipids, including 44.2% ethyl oleate, 34.8% ethyl palmitate, 14.6% ethyl linolenate, 6% ethyl stearate, and 0.4% methyl oleate. It is reported that this mixture or each ester used alone has been used as a quarantine measure in the United States.

2. How to prevent and control mealworms on trees

The special medicines for controlling mealworms include pymetrozine, acetamiprid, pymetrozine, Wenlie, cypermethrin, imidacloprid, etc. These medicines have good control effects on mealworms. Before bagging, you can use 2000 times of Wenlie for the first time, 4000 times of imidacloprid for cypermethrin for the second time, and 3000 times of cypermethrin for the third time to eliminate some mealworms that escaped after the first two times of medication. After bagging, you can use 3000 times of cypermethrin to seal the bag mouth.

3. How to prevent mealworms from getting sick

Mealworm disease control

Under normal feeding and management conditions, mealworms rarely get sick. However, as the feeding density increases, the incidence rate gradually increases. Therefore, it is necessary to check in time and solve problems in time.

Soft Rot

This disease often occurs in the rainy season due to high humidity, fecal contamination, feed deterioration, high stocking density, and excessive force during larval feces cleaning and grading, which causes worm injuries. The larvae are slow to move, have a decreased appetite, have watery and clear feces and finally excrete black feces, and their bodies gradually become soft and black. The excretions of diseased insects can infect other insects. If not handled in time, the entire box of insects will die. Prevention and control: If soft worms are found, they should be handled in time, green vegetables should be parked, leftover food should be cleaned, and indoor humidity should be adjusted. Mix 0.25g of chloramphenicol or chloramphenicol with 250g of wheat bran and feed.

Dry blight

When the insect is sick, the tail and head dry up and then the whole body dries up and dies. The cause is too dry air and too dry feed. Prevention and control: In the dry season, feed green feed in time, sprinkle water on the ground to humidify, and set up water basins to cool down.

Mite disease

Mites are very harmful to mealworms, causing them to be thin, slow to grow, with low hatching rates and reduced reproduction rates. Causes: Feed humidity is too high, temperature is too high, and food is contaminated with mites. It usually occurs from July to September. Prevention and control methods: Adjust the indoor air humidity and keep indoor air circulation in summer to prevent food from being contaminated with mites. Feed should be stored in a sealed container. Rice bran and wheat bran should be disinfected and fed after drying. Generally, 40% trioxychloride at 1000 times should be used to spray corners, feeding boxes and feed.

4. How to prevent and control yellow powder aphids?

Yellow mealworm, also known as yellow mealworm and pear aphid, belongs to Homoptera, Phylloxera family, and is a polymorphic aphid. The insect body is very small, bright yellow, and slightly shiny.

Yellow meal aphids prefer shaded environments, and since they prefer shade and fear the sun, the folded seams of the bag mouths and the inside of the paper bags of bagged pears just meet this condition. Once the insects enter the bag, it is like entering an extremely safe area, where they can reproduce in large numbers and cause harm.

Since the adult yellow meal aphids are wingless and cannot fly, and crawl slowly, they can only rely on flying birds and insects to spread around, such as all birds and cicadas, bees, butterflies, moths, etc. The occurrence and degree of damage are related to the climate. Warm and dry weather is beneficial to the reproduction of the insect. Once the flood season begins, continuous rainfall is not conducive to the reproduction of yellow meal aphids. However, this kind of weather will never affect the reproduction and damage of yellow meal aphids in paper bags. Therefore, all yellow meal aphids that enter paper bags will reproduce in large quantities and quickly, and the damage will also be serious. In mild cases, the fruit surface will be partially moldy, and in severe cases, the whole fruit will be moldy.

Key points for prevention and treatment:

1. Manual control: From late autumn to early spring, scrape off the rough bark, combine winter pruning with cutting off damaged and broken branches, and burn them to reduce the overwintering base, which is the main measure to reduce the damage caused by this insect.

2. Chemical control: Spray 5-degree lime sulfur mixture before germination to kill the exposed overwintering eggs. After flowering and throughout the occurrence period, combined with the control of pear aphids and pear psyllids, you can use 2500-3000 times solution of 10% imidacloprid series products, 1000 times solution of 80% trichlorfon, 1500 times solution of 80% dichlorvos, or other compound drugs that can control both insects and mites, which have significant control effects on the insects.

3. For bagged pears, take samples and check the bags every 10 days or so. If the insect rate reaches 15%, remove all bags, remove the insect fruits and spray pesticides immediately. For yellow powder aphids in paper bags, soak them in 1000 times diluted dichlorvos solution, dry them in the sun and then bag again.

4. If no insects are found in the bag, spray the opening of the paper bag again each time you spray the pesticide to kill the mealworms around the bag opening and prevent them from entering the bag.

5. Prevention and control of mealworm mite disease

Methods to prevent mites: Select good mealworms and expose the feed to the sun. The moisture of fruits, vegetables and wild vegetables in the feed should not be too high.

6. How to prevent mealworms from evolving

Are you asking how to prevent degradation?

1. Select and breed, purify and strengthen

2. Intergenerational hybridization

3. Optimization of breeding conditions