What pesticide is effective for controlling beetles?
Beetles, also known as weevils, are a common type of insect during crop growth, with many species and a wide range of damage, and in severe cases can reduce crop yields, so what pesticide should be used for beetles?
1. What pesticide should be used for beetles?
For beetles, pesticides such as beta-cyhalothrin, deltamethrin, chlorpyrifos, and trichlorfon are used for control. Generally, 90% crystalline trichlorfon or 50% phoxim emulsifiable concentrate at 1000-1500 times dilution is used to drench the roots of each plant, with 100-200 ml of pesticide solution per plant. When damage appears in the field, they can be used in mixed formulations or alternately, but do not use a single pesticide alone.
2. Are beetles poisonous?
There are many kinds of beetles; some are poisonous and some are not. For example, blister beetles and ground beetles of the family Carabidae are poisonous.
1. The most poisonous beetle is the blister beetle, also known as “ban mao”, “long hao”, and “di dan”, belonging to the genus Mylabris in the family Meloidae of the order Coleoptera. The hydrogen cyanide released by one blister beetle can kill a cow. In addition to the hydrogen cyanide produced by the last abdominal segment, a yellow venom, cantharidin, is secreted from the leg joints. It can destroy the cell tissues of higher animals, and after contact with the human body, it can cause skin redness, swelling, and blistering.
2. Ground beetles of the family Carabidae spray an extremely irritating-smelling liquid to defend themselves. Although non-toxic, the smell is indescribable. Some beetle larvae, such as firefly larvae, can release anesthetic substances, but they are harmless to humans because the amount is too small.
3. Very few species of beetles are poisonous. Basically, all the ones you can see are non-toxic. Some ground beetles and firefly larvae (that is, firefly larvae) secrete some chemical substances that have mild effects. There is also the blister beetle that Lu Xun once mentioned. Family Meloidae. This family also has some irritating substances, but they are not harmful and can instead be used as medicine.