Mid-term management of peppers and pest control
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July 24 09:49:45, 2025
Pepper plants are currently in a critical phase of both vegetative and reproductive growth, which also marks the peak season for pest activity. To ensure a bountiful harvest, it's essential to implement proper field management and effective pest control strategies. This period is crucial for setting the foundation for high yields. According to **The Chinese Pesticide Network**, here are some key recommendations for vegetable farmers to follow:
**First, Watering and Fertilization:**
If there has been no rainfall for 5–7 days, light irrigation should be carried out. Apply 1000–2000 kg of organic fertilizer per acre, along with 10–15 kg of diammonium phosphate and 5–10 kg of potassium sulfate. Avoid flooding during the rainy season. In July and August, when rain is frequent, it’s important to loosen the soil regularly. Shallow tilling (2–4 cm) is recommended to improve soil aeration and root development.
**Second, Pest and Disease Management:**
Several diseases and pests commonly affect pepper crops. The main diseases include viral infections, blight, and bacterial spot. Common insect pests include the cotton bollworm, red spider mites, aphids, and diamondback moths. Here’s how to manage them effectively:
1. **Viral Diseases:**
Controlling aphids is key to reducing virus transmission. Use a mixture of imidacloprid (1500–2000 times dilution) with virus A (500 times dilution) or virus spirit (500 times) for spraying. Another option is to use imidacloprid + Feng Biling (4000–5000 times dilution).
2. **Fungal Diseases (e.g., Blight):**
This fungal disease can lead to branch dieback and plant death. Spray with chlorothalonil (600 times) combined with Feng Biling (4000–5000 times). Apply 3 kg of 96% copper sulfate per acre after watering, then spread it evenly on the surface.
3. **Fusarium Wilt:**
Use a product like *Cotton Rehabilitation Spray* to treat affected areas.
4. **Cotton Bollworm (Helicoverpa armigera):**
Apply pyrethroid insecticides combined with avermectin. Alternatively, use carbamate-based pesticides with chlorpyrifos.
5. **Red Spider Mites:**
Apply avermectin in the late afternoon for best results.
6. **Diamondback Moth:**
This pest has multiple generations and strong resistance. Avoid continuous use of single-pesticide formulations. Instead, opt for **biological pesticides**. Effective combinations include thiazolonitrile + chlorfenapod, pyrethroids + *Bacillus thuringiensis (BT)*, or avermectin (4000–5000 times) + pyrethroid (2000–3000 times).
**Important Notes:**
Never use highly toxic **pesticides** such as methomyl, parathion, methyl parathion, monocrotophos, or phosphoramide. Also, avoid using nitrate nitrogen fertilizers, as they can negatively impact plant health and yield.
By following these practices, farmers can protect their pepper crops and achieve better productivity while maintaining sustainable agricultural methods.