Both Bacillus thuringiensis and Krabi salt are highly effective insecticides. Which one is better? China Pesticide Network will help you compare:
Bacillus thuringiensis is a bacterial insecticide, and we are commonly known as BT suspension. It is also a common high-efficiency spectrum insecticide. These two drugs are aimed at Lepidoptera pests and are not comparable. It depends on the resistance of the pests. After the spraying of Bacillus thuringiensis, the pests can kill the pests after eating for 48 hours. A vitamin salt has a contact and stomach toxicity and has a weak fumigating effect, but the lethal effect is also slow. It should be a feature of each, the Bacillus thuringiensis is non-polluting, and the residual salt of the A-dimensional salt is large. These two kinds of pesticides are best not to be used alone, it is best to use with other pesticides, and can be compounded with cyhalothrin.
Emamectin benzoate
(1) Applicable crops: A vitamin salt is highly safe for all crops at the protected site or 10 times the recommended dosage. Western countries have used many food crops and cash crops. Consider it is a rare green pesticide. China should first use it on tobacco, tea, cotton and other cash crops and all vegetable crops to control pests.
(B) Mechanism of action: A vitamin salt can enhance the action of neurotransmitters such as glutamate and gamma-aminobutyric acid (GABA), thereby causing a large amount of chloride ions to enter nerve cells, causing loss of cell function, disturbing nerve conduction, and larvae after contact Stop eating immediately, irreversible paralysis occurs, and the highest mortality rate is reached within 3-4 days. Because it is tightly combined with soil, does not leaching, does not accumulate in the environment, can be transferred by Translaminar movement, is easily absorbed by the crop and penetrates into the epidermis, so that the crop has long-term residual effect, and appears second in more than 10 days. The killing rate of insecticides is high, and it is rarely affected by environmental factors such as wind and rain.
(3) Prevention and control of pests: Avidin has many activities unmatched by other pesticides, especially for Lepidoptera, Diptera, and ultra-efficient, such as the red-striped moth, the larvae, the cotton bollworm, the tobacco hawk moth, Plutella xylostella, beet armyworm, Spodoptera litura, Spodoptera litura, Brassica chinensis, Cabbage butterfly, Cabbage, Cabbage, Tomato hawk moth, Potato beetle, Mexican ladybug, etc.
(4) A vitamin salt has undergone a large number of clinical discoveries in use, and it cannot be continuously used during the growth period of the crop. It is best to use other pesticides in the second stage of the insect-borne period. !
Avermectin
First, the mode of action and characteristics: contact, stomach poison, strong penetration. It is a macrolide disaccharide compound. It is a natural product isolated from soil microorganisms. It has contact and stomach toxicity to insects and mites and has a weak fumigating effect without systemic action. However, it has a strong osmotic effect on the leaves, which can kill the pests under the epidermis and has a long residual effect. It does not kill eggs. Its mechanism of action differs from that of general insecticides in that it interferes with neurophysiological activities and stimulates the release of r-aminobutyric acid, while r-aminobutyric acid inhibits the nerve conduction of arthropods, mites, mites and insects. The larvae appear paralyzed after contact with the agent, inactive and do not feed, and die after 2-4 days. It does not cause rapid dehydration of insects, so its lethal effect is slower. However, although there is a direct killing effect on predatory and parasitic natural enemies, the damage to beneficial insects is small due to the small residual surface of the plants. It has obvious effects on root-knot nematodes.
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