Before recommending pesticides, I need to remind you: **Pesticide use must strictly comply with local regulations, give priority to legal products registered on target crops and pests**, and pay attention to safe operations (protective measures, application interval, environmental friendliness). The following are the basic ideas of scientific drug selection： --- ###1. Clarify the key information first (you need to supplement it) 1. **Types of pests** (such as aphids, rice planthoppers, cotton bolls, etc.) *The sensitivity of different pests to agents varies greatly, such as：* -Lepidoptera larvae (vegetable greenworm, cotton bollworm) → Chlorophyll benzamide, methyl-vitamin salt -Biting mouthparts pests (aphids, whiteflies) →imidacloprid, acetamiprid -Underground pests (grubs, ground tigers) → Octathion granules (pay attention to areas with high toxicity that have been banned) 2. **Crop type and growth stage** *Some agents are sensitive to specific crops (such as melons, which are susceptible to chlorpyrifos, and neonicotinoids are used with caution during flowering to prevent bee injury)* 3. **Drug resistance management** *Long-term single administration can cause resistance to pests. It is recommended to rotate agents with different mechanisms of action. * --- ###2. Common types of high-efficiency insecticides (for example) | Type | Representative composition | Characteristics and precautions | |--------------------|--------------------|---------------------------------------| | ** Biologically derived insecticides ** / Bacillus thuringiensis (Bt) / Environmentally friendly, for lepidoptera larvae, it needs to be applied in the early stages of larvae | | / Multi-bactericidal hormone | Highly effective for thrips and small vegetable moths, and has little effect on beneficial insects | | * *Insect growth regulator ** | Lice mite urea, fluorolinguride / Inhibit molting, have a long lasting effect, and are ineffective for adults | | ** Bisamides * * / Chlorophyll benzamides / Internal absorption and conduction| high efficiency for lepidoptera, rapid development of resistance, need to be rotated | | ** Neonicotinoids * * / Thiamethoxam, furosemide | Strong internal absorption, pay attention to bee safety, some countries have restricted the use | | ** Antibiotics * * | Avermectin / Broad spectrum, effective for mites, pay attention to the distinction from acaricides | --- ###3. Comprehensive recommendations 1. **Give priority to low-toxicity and highly targeted agents**, such as： -Prevention and control of aphids: fluoridinamide nitrile (Teflon) -Prevention and control of rice planthoppers: Enidinamide + aphidone -Prevention and control of cotton bollworm: methyl-vitamin salt + indoxavir 2. **Use broad-spectrum and highly toxic agents** (such as chlorpyrifos, Gebuweiser) with caution, unless there is no alternative and they comply with regulations. 3. **Combined with agricultural control**: such as insect attractants, sexual attractants, and natural enemy insects (red-eyed bees, etc.) to reduce chemical dependence. *The final plan must be determined based on the actual insect situation, resistance monitoring and guidance from the agricultural technology department. It is recommended to bring pest samples or photos to the local plant protection station for precise medication guidance. *