(i) Trichlorfon
It is a broad-spectrum insecticide with low toxicity, strong stomach toxicity, high contact toxicity and permeability, but it is suitable for the control of pests in rice, wheat, vegetables, fruit trees, cotton and other crops.
Formula 25%, powder 6%, 80%, soluble paste 85%, emulsifiable concentrate 50%, wettable powder 50%, oil agent 25% and crystal trichlorfon 90%.
Application mode
(1) Control cotton bollworm. Per mu (667 square meters. ) spray 80% soluble powder 150 ~ 200 g, and add 75% water.
(2) Control vegetable pests. Such as Pieris rapae, Plutella xylostella and Spodoptera brassicae, 80-100g of 80% crystals or soluble powder are sprayed with 500kg of water per mu.
Note: Trichlorfon is used in vegetables with an interval of 7 days. Sorghum is sensitive to trichlorfon. You should avoid going near it.
(2) acephate (high phosphorus elimination)
Low-toxic pesticide, with contact toxicity and stomach toxicity, can kill eggs and has certain fumigation effect. It is a slow-acting pesticide with strong aftereffect and can be used for the prevention and control of crop pests such as vegetables, fruit trees, cotton, rice, oilseeds and wheat.
The formula is 30%, 40% emulsifiable concentrate and 25% wettable powder.
Application mode
(1) Control Pieris rapae and Plutella xylostella. For larval control, 80 ~ 120 RNL of 30% EC and 40 ~ 50 kg of water are sprayed per mu.
(2) Control aphids. Spraying 50 ~ 75ml of 30% emulsifiable concentrate and 50 ~ 75kg of water per mu.
(3) Control cotton aphid. Use 30% EC100 ~150ml and 50 ~ 75kg water per mu, and spray continuously.
(4) Control cotton bollworm. 30% EC per mu150 ~ 200ml, add 75 ~150 ~ 200ml of water and spray continuously.
(5) To control fruit tree pests such as peach fruit borer and pear fruit borer, dilute 500-750 times with 30% emulsifiable concentrate and spray evenly.
(3) Marathon (malathion)
Low toxic pesticides, good contact toxicity, have a certain fumigation effect.
Formula: 45% phoxim EC, 25% malathion EC and 70% malathion EC (pest control phosphorus).
Application mode
(1) to control wheat aphids, 45% EC 1000 times solution was used, and 75 ~ 100 kg liquid medicine was sprayed per mu.
(2) To control the pests of bean crops, spray with 45% EC 1000 times of liquid, and use 75 ~ 100 kg of liquid medicine per mu.
(3) To control fruit tree pests, spray 45% EC 1500 ~ 2000 times.
(4) To control vegetable pests, spray 45% EC 1000 times of liquid, and use 75 ~ 100 kg of liquid medicine per mu.
(4) dimethoate
Moderate toxicity, wide insecticidal range, strong contact toxicity to pests and mites and certain stomach toxicity. It has a good control effect on aphids, leafhoppers, whiteflies, latent pests and some scale insects, and also has a certain control effect on mites.
Formula 40% and 50% emulsifiable concentrate.
Application mode
(1) To control cotton aphid, 50 ml of 40% EC and 60 kg of water should be sprayed per mu.
(2) To control wheat aphids, spray 50 ~ 80ml of 40% EC and 60 ~100kg of water per mu.
(3) To control vegetable pests, 50 ml of 40% emulsifiable concentrate and 60-80 kg of water should be sprayed evenly per mu.
(4) Control fruit tree pests by spraying 40% EC 800- 1000 times per mu.
Precautions: Use all kinds of crops for up to 3 times, with an interval of 10 day, and the last spraying distance should not be less than 10 day. Can not be mixed with alkaline pesticides such as stone sulfur mixture and Bordeaux mixture.
(5) Phoxim
It is easy to decompose when exposed to light, with short residual effect period, generally 2 ~ 4 days, quick knock-down, contact poisoning and stomach toxicity, and low toxicity to people and animals.
45% phoxim EC and 50% phoxim EC.
Application mode
(1) Control Pieris rapae, Plutella xylostella, Pieris rapae, Helicoverpa armigera, etc. , sprayed with 50% EC mixture 1000 times water.
(2) Control leek maggots, ground tigers, jumping beetles, etc. Root irrigation with 50% EC 800- 1000 times.
Matters needing attention
(1) Stop taking the medicine 6 days before harvesting green vegetables and Chinese cabbage, 3 days after harvesting cucumber and 10 day after harvesting leek.
(2) Keep away from light during storage and apply pesticide at night.
(3) Bean and Chinese cabbage are prone to phytotoxicity at seedling stage, so the dosage should be strictly controlled.
(4) Avoid mixing with alkaline substances.
(6) Fenthion (Fenthion)
It has contact toxicity and stomach toxicity, easy to decompose and fail at high temperature, wide insecticidal spectrum and low toxicity to people and animals.
Formula 50% EC.
Application mode
(1) In order to control LEPIDOPTERA pests such as Pieris rapae, Plutella xylostella and Spodoptera brassicae, 50% EC was sprayed with 1000 times solution.
(2) To control mites and aphids, spray 50% EC 1000 times to1500 times.
Matters needing attention
(1) cannot be mixed with alkaline pesticides. If it is mixed with Bordeaux mixture, it must be mixed temporarily before use.
(2) Stop using vegetables 10 day before harvesting.
(7) Lesburn
Chlorpyrifos, also known as chlorpyrifos, is an insecticide and acaricide, which has the effects of contact killing, stomach poisoning and fumigation, and has a good control effect on underground pests.
The dosage forms are 40.7% Oxfam emulsifiable concentrate and 14% insecticidal blue bead granules.
The control method of Pieris rapae and Plutella xylostella was (1), and 40.7% leshi EC 1000 ~ 2000 times was sprayed in the larval stage.
(2) In order to control the red spider, 40.7% Oxfam EC 1000-2000 times was sprayed at the early stage of mite infestation.
(3) To control underground pests, 22.5 kilograms of 14% insecticidal blue bead granules are used per hectare, which are evenly spread on the roots of plants and covered with thin soil to prevent various underground pests.
Matters needing attention
(1) cannot be mixed with alkaline pesticides.
(2) It is toxic to bees and fish, and leafy vegetables are forbidden to be eaten 7 days before harvesting.
Second, biological pesticides.
(1) Bacillus thuringiensis
It is an entomopathogenic tapeworm, which has a strong poisoning effect on the larvae of Lepidoptera pests, but the poisoning speed is slow. When the temperature is above 20℃, the insecticidal effect is good, and the duration is 7 days to 10 days. It is safe for people, livestock and vegetables.
The form of medicine
Powder, water.
Usage: Add 50kg of water to 100 ~ 150g (ml) per mu to control LEPIDOPTERA pests such as Pieris rapae and Plutella xylostella. Irrigate leek roots with 250 grams of water and 50 kilograms of water per mu to control leek maggots.
Precautions should not be mixed with fungicides.
(2) Avermectin
A broad-spectrum, efficient and pollution-free biological insecticide.
0.9% EC, 0.6% EC and 1% emamectin benzoate EC.
Application mode
(1) To control fruit spider mite, fruit spider mite and psyllid, spray with 0.9% EC 2000 times.
(2) To control Pieris rapae and Liriomyza sativae, spraying 4000-6000 times of 1% EC.
Matters needing attention
(1) cannot be mixed with alkaline pesticides.
(2) Spraying in the evening and cloudy days is effective.
(3) Fruit and vegetable net (0.5% azadirachtin EC)
Botanical insecticide, whose main component is azadirachtin extracted from Azadirachta indica.
Formula 0.5% EC.
Use method to control Pieris rapae and Spodoptera brassicae, spraying 0.5% emulsifiable concentrate 700-800 times.
(4) Compound Sophora flavescens insecticide
The natural botanical insecticide prepared by Chinese herbal medicines has low toxicity and no residue, and has strong stomach toxicity to pests.
Formula: 0.04% aqua and 0. 1% powder.
Application mode
(1) seed dressing. Vegetable seeds are soaked with 100 ~ 200 g powder, and the seeds that are not soaked are sprayed with 100~200g water, and then sown at any time, mainly to control underground pests. After seed dressing, the seeds are dark brown, which does not affect the germination rate.
(2) Soil treatment. 2 ~ 3kg flour L (3 ~ 4kg old vegetable field) per mu is mixed with15kg fine sand or fine soil, and applied in the transplanting hole before spreading or transplanting. Before closing the shed, the leek is spread flat, deeply hoed and watered once every 3-4 days, and then 2-3 kg of medicine 1 is removed from the first leek, and 35 kg of fine soil hoe is added.
(3) spraying. Spraying 0.04% aqueous solution 400-800 times to control aphids, cabbage caterpillars and diamondback moths.
Precautions should not be mixed with alkaline pesticides. If it rains 9 hours after application, it should be sprayed again and stored in a cool and dry place. The validity period is 2 ~ 3 years.
Third, carbamate insecticides.
pirimicarb
It is moderately toxic to humans and animals, and it is easy to decompose and fail in acidic and alkaline solutions.
The formula is 50% wettable powder and 50% water dispersible granules.
Usage: spray 50% wettable powder 2000 ~ 3000 times to control aphids.
Matters needing attention
(1) 7 days before harvesting to 10 days.
(2) Do not mix with alkaline substances.
(3) It has no effect on cotton aphid.
Fourthly, pyrethroid insecticides.
(1) fenvalerate
Also known as interlayer and fenvalerate, it has contact toxicity and stomach toxicity, and moderate toxicity to people and animals. The residue period is 10 days to15 days, and there is little residue in vegetables. It has good control effect on LEPIDOPTERA larvae and aphids, but it is ineffective on mites.
Formula 20% EC
Application mode
(1) Control Pieris rapae, Plutella xylostella, cutworm, aphid, Spodoptera litura, thrips, etc. Spray with 20% milk sleeve for 3000-4000 times.
(2) To control cotton bollworm, spray 20% EC for 2000-4000 times.