A simple method to eliminate the corn elephant

Agricultural control: spread gunny bags around the grain noodles or grain piles in late autumn and early winter, lure adults to lurk under the bags, and then collect and destroy them, while in spring, pesticide belts can be sprayed around the outside of the warehouse to prevent the adults from overwintering outside the warehouse and then enter the warehouse. Chemical control: fumigation with methyl bromide or aluminum phosphide and other chemicals. Biological control: insert a grass handle or bamboo tube on the top of the grain heap. When you pick up the grain by hand, the adults will climb to the top grass handle or hide in the bamboo tube, and then collect and destroy it.

1. The simple method of killing the corn elephant

1. Agricultural prevention and control

But in late autumn and early winter, when a large number of adults crawl out of the winter in the grain pile, spread gunny bags around the grain noodles or grain piles, lure the adults to lurk under the bags, then collect and destroy them, and wait until the spring turns warm. Spray pesticide belts around the warehouse to prevent the adults from overwintering outside the warehouse and then enter the warehouse, during which exposure and sifting grain are needed.

2. Chemical control

Malathion with a weight ratio of 1 pound 10000 can be mixed into the grain heap. When the corn elephant is more serious in the granary, and the general method is not suitable, methyl bromide or aluminum phosphide and other agents can be used for fumigation.

3. Biological control

Generally, adults have the habit of climbing up, pick a large number of small sharp piles on the grain surface, and insert a grass handle or bamboo tube on top of each heap. When picking food by hand, the adults will begin to climb to the top of the pile or hide in the bamboo tube, during which time they can be collected and destroyed.

Second, the living habits of the corn elephant

1. Corn elephants are mainly parasitic on corn, buckwheat, beans, peanut kernels, hemp seeds, cereal flour, dried fruits, yeast cakes, macaroni and bread.

2. The larvae will only eat cereal seeds, in which corn, wheat and sorghum suffer heavily, which occurs one to several generations a year, which varies from region to region. It can not only reproduce in the warehouse, but also fly to the field to breed. It has strong cold tolerance, hunger tolerance, fecundity and rapid development.

3. The morphological characteristics of the corn elephant.

1. Corn elephant eggs: oval, 0.65-0.70 mm in length and 0.28-0.29 mm in width, milky white, translucent, slightly round at the lower end, gradually narrow at the upper end, cap-shaped small uplift at the upper end, and similar to the eggs of the grain elephant.

2. Corn elephant larvae: the body length is 2.5-3.0 mm, milky white, many horizontal wrinkles, the back is raised, the ventral surface is flat, all the hypertrophy is thick and short, slightly hemispherical, legless, small head, light brown, slightly wedge-shaped, grain elephant larvae are similar to them.

3. Corn elephant pupa: the body length is 3.5-4.0 mm, it is oval, milky white to brown, the head is round, the beak extends to the middle foot ganglion, there are 8 pairs of small protuberances on the forechest dorsal plate, each has a brown setae, the abdomen is 10 nodes, and there is a pair of flesh thorns at the end of the abdomen.

Fourth, the harm of corn elephant

1. Corn elephant is not only the number one stored grain pest in China, but also an important stored grain pest in the world. Corn elephant is a boring pest, and adults like to eat cereal seeds, as well as stored materials such as flour, oil and plant medicinal materials. generally, wheat, corn, brown rice and sorghum suffer more seriously.

2. The larva only harms the cereal seeds, mainly storing the aged grain for 2-3 years, the adults eat, and the larvae eat the grain, which is a main primary pest. The stored grain is bitten by corn elephants, resulting in a large number of grains and crumbs, which is easy to cause the occurrence of late-stage pests, which can increase grain moisture and heat after damage, and can fly to the field to harm.