Insecticides can only work if they enter the body of the pest and reach the site of action. Therefore, in order to fully understand the characteristics and living habits of pests, the correct insecticides can be used against pests in the course of chemical control.

Most insecticides enter insects through insect mouthparts and exert their insecticidal action. According to the feeding characteristics of pests, insects can be classified according to their characteristics.

1. Chewing mouthpart pests: These pests must eat plant leaves or other tissues when they damage crops, causing damage such as blade nicks, mainly Lepidoptera larvae (such as leaf leafworms, nocturnal larvae, etc.), Coleoptera pests (beetles), Orthoptera nymphs and adults (carps, crickets, cockroaches), Hymenoptera larvae, and adults. Poisonous insecticides with strong stomach toxicity have the most significant effect on this kind of pest control, such as the most commonly used organophosphate insecticides, some carbamate insecticides with stomach toxicity, pyrethroid insecticides, and sand Silkworm toxin insecticides, benzoyl urea insecticides, some insect hormones insecticides, avermectin insecticides. Insecticides with good systemic absorption but poor contact and stomach toxicity are generally not effective against these pests.

2. Inhalation mouthparts Insect pests: These pests suck the young tissues of plants through the mouthparts and suck the juices in the tissues, causing harms. The main pests are grasshoppers, leafhoppers, cockroaches, adult insects of the scale beetle, and mosquitoes. Adults, thrips, etc. For such pests, insecticides with good systemic absorption or good introgression and better stomach toxicity should be selected. The systemic insecticides mainly include organic phosphorus insecticides, carbamate insecticides, nereistoxin insecticides, imidacloprid insecticides, acetamiprid insecticides, and the like.

Underground pest control medication

The main pests in the ground include pupa (scarab larvae), tigers, crickets, dragonflies, flower buds, and leaf a. According to the nature of life, these pests may live in the soil or on the soil surface at a certain stage, and the damage site is special. When pesticides are applied, the combination of pesticides and soil particles should be considered. Some pesticides lose their insecticidal effect when combined with soil. Therefore, the choice of pesticide ingredients is critical. They can be controlled by insecticidal granules mixed with soil or by using ground spraying insecticides. They can also be used as insecticides. Mix bait to kill insects.

Drugs for special pests

In the melon crops, if the fruit fly pests do not have good control effects, the fruit flies can be considered for their acidity and sweetness, and attractants can be made to control them.

For borer pests, such as damaging stems, the control method is mainly based on injection of high-strength liquid medicine, and the pesticide is preferably selected to have a fumigation or systemic insecticide.

For pests of the genus Hibiscus that are infested in their current year, such as wood moths, worms, etc., it is necessary to control the spraying of insect pest eggs during hatching. Pharmacists should choose insecticides that have good stomach toxicity and good contact toxicity (and have good endovasation).

Magnetic Bead Acid Nucleic Extraction Kit

In order to implement the requirements for the prevention and control of the new coronavirus pneumonia epidemic, all parts of the country are actively cooperating in the normalization of epidemic prevention and control. Each city has arranged multiple nucleic acid testing sampling points, and requires a negative nucleic acid test result within a few days. Public places are accessible, and the importance of nucleic acid testing for epidemic prevention and control is self-evident.
As of now, there are 13,000 medical and health institutions in the country that can carry out nucleic acid testing, and 153,000 professional and technical personnel are engaged in nucleic acid testing technology. The nucleic acid testing capacity has reached 57 million tubes per day. In order to help the prevention and control of the new crown epidemic, Yisheng Biology quickly launched the nucleic acid extraction reagent + 96-channel automatic nucleic acid extraction instrument. It only takes about 10 minutes to extract 96 nucleic acid samples at one time, and extract nucleic acid in a faster and more accurate way. Work becomes more efficient.
Magnetic Bead Swab Sample Viral DNA/RNA Extraction Kit can be used to isolate and purify high-quality viral DNA/RNA from various swabs and virus culture supernatants. By using magnetic beads with unique separation function and carefully optimized buffer system to efficiently capture the released nucleic acid, the extracted nucleic acid has high yield and good quality, which is suitable for various downstream application experiments, such as RT-qPCR, qPCR and other experiments.

Magnetic Bead Acid Nucleic Extraction Kit,Viral Dna Extraction Kit,Viral Rna Extraction Kit,Rapid Viral Rna Extraction Kit

Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com