Pests generally go through a development process from eggs to adults during their development. Eggs are the primary stage of pests. Since eggs are inactive and harmless, they are the best period for pest control. However, since eggs are round or oval in shape and covered with a layer of eggshell, the amount of pesticide applied is small, and it is difficult for the pesticide to enter the interior, and most pesticides do not kill eggs. Today I will introduce to you a pesticide that specifically kills insect eggs, which is pyriproxyfen.
Introduction to pyriproxyfen
Pyriproxyfen is a juvenile hormone chitin synthesis inhibitor developed by Sumitomo Corporation of Japan in the 1980s. It mainly inhibits the synthesis of chitin in pests, so that pests cannot form epidermis when molting, making it impossible for pest eggs to hatch into larvae and pupae to emerge as adults, thereby killing pests. It has a good killing effect on insects such as Homoptera, Lepidoptera, Coleoptera, Neuroptera, whiteflies, whiteflies, scale insects, diamondback moth, beet armyworm, Spodoptera litura, pear psyllid, thrips, etc., especially whiteflies, psyllids, mosquitoes, flies and other pests.
The main formulations of pyriproxyfen are granules, emulsifiable concentrates, suspensions and tapes. It is widely used in the prevention and control of whiteflies and scale insects on fruits, vegetables, cotton and ornamental plants, as well as mosquito and fly control and animal health in public health. It has good light stability, low dosage, high activity, strong leaf conductivity and systemic absorption, long lasting effect, safety for crops, low toxicity to mammals and little impact on the ecological environment. It meets the goal of human protection of the ecological environment and is considered to be one of the effective means of integrated pest management, becoming an important field of insecticide research and development.
Main features
Pyriproxyfen has the advantages of systemic transfer activity, high efficiency and low toxicity, long lasting effect, safety for crops, low toxicity for fish, little impact on the ecological environment, no odor, and easy to use. It is the first choice for killing pest eggs and is widely used in crops, vegetables, fruit trees, flowers, Chinese medicinal materials and other crops.
Usage
(1) To control pests such as whiteflies, whiteflies, scale insects, thrips, etc., 30% pyriproxyfen suspension can be evenly sprayed at 3000 times the peak period of pest egg laying. It has a good killing effect on adults, nymphs and eggs, and the lasting effect can reach about 30 days.
(2) To control pests such as beet armyworm, armyworm, cotton bollworm, diamondback moth, etc., 30% pyriproxyfen suspension can be evenly sprayed at 20-25 ml/mu with 50 kg of water during the early larval stage of the pests. It can kill pest eggs and larvae, and the lasting effect can reach 30 days.
Compounding scheme
(1) Pyriproxyfen + Bifenthrin. Bifenthrin is a synthetic pyrethroid insecticide/acaricide, which is classified as a non-cyanide pyrethroid. This active ingredient can effectively control pests through contact and stomach action, without systemic or fumigation effects, with a broad insecticide spectrum, rapid action, and long residual effect.
It can be used to control a variety of pests and red spiders on crops such as cotton, fruit trees, vegetables, and tea trees. The combination of bifenthrin and pyriproxyfen has a synergistic effect and is suitable for controlling animal pests found in agriculture, animal health, forests, gardens, and leisure equipment, and the protection and sanitation of stored products.
(2) Pyriproxyfen + cyproterone. Cyproterone is a nereistoxin insecticide with stomach poison, contact killing, and systemic effects. It can be transmitted apically and acts at the cholinergic synapse, inhibiting the normal transmission of nerves and making the nerves of the pests unresponsive to external stimuli. When the pests contact or ingest the agent, the insect body quickly becomes sluggish, paralyzed, and eventually dies. The insecticide ring has excellent insecticidal effects on thrips, whitefly nymphs and adults, but has poor egg-killing effects and a short duration. Pyriproxyfen has poor insecticidal effects on thrips, whitefly nymphs and adults, but it has a strong egg-killing effect and a long duration. The combination of insecticide ring and pyriproxyfen can kill adults, nymphs and egg masses with one application, and prolongs the duration.
