As temperatures rise, the larvae of ladybugs can cause damage to eggplants and potatoes. Meanwhile, leafhoppers feed on the sap from the underside of eggplant leaves, leading to discoloration and redness. In addition, pests such as aphids, cabbage caterpillars, diamondback moths, cotton bollworms, and tobacco budworms continue to harm a wide range of crops. It is crucial to implement timely prevention and control measures to manage these threats effectively.
In open fields, cucumbers are particularly susceptible to downy mildew, anthracnose, bacterial angular leaf spot, and root-knot nematodes. Tomatoes often face early blight, late blight, viral diseases, and spot blotch. Peppers are prone to viral infections and other diseases, while melons are also vulnerable to anthracnose and viral issues. For these recurring problems, enhanced preventive measures and effective control strategies are essential.
To combat downy mildew in melons, it is recommended to apply 50% Anke 7–10 days before symptoms appear, along with 43% Good Lectra or 53.8% Can Kill 2000, or 50% chlorothalonil and 70%ç¿ è´ (Cui Bei). For diseases like cotton plague, early and late blight, and leaf spot on solanaceous crops, using 72% Best or Anke combined with Dasheng M45 is effective. Alternating between different pesticides improves efficacy, while adding Cloud-120 helps reduce phytotoxicity and enhances growth regulation.
For pests like aphids, whiteflies, and spider mites, spraying 10% imidacloprid or 3% acetamiprid can be effective. For cabbage caterpillars, heartworms, and cotton bollworms, 4.5% emamectin benzoate or 0.8% Yifu biological pesticide is recommended.
Watermelon blight can be managed by spraying 40% pentachloronitrophenol wettable powder at 1000 times dilution or 40% melon-dried at 600 times. For watermelon blight and powdery mildew, 10% or 40% DuPont Fuxing at 5000–6000 times, or 4000 times, is advised. Watermelon blight can also be treated with 600 times antivirus矾 (antivirus alum) or 70% ethyl phosphorus manganese zinc at 400–600 times.
For watermelon leaf miners (Liriomyza huidobrensis), spray 3000–5000 times or 1% insecticidal soap at 1000–1500 times. Aphids and thrips can be controlled with Emerald at 25,000–30,000 times or 20% Confort at 5000 times.
Tomato late blight can be treated with 64% mancozeb or 70% alum at 600 times, or 400–600 times MnZn fosetyl aluminum. Cucumbers and long melons affected by powdery mildew should be sprayed with DuPont Fuxing at 5000–6000 times. For Plutella xylostella (cabbage worm), 1% insecticidal soap at 1000–1500 times or 5% Regent at 1500 times is effective.
By staying proactive and applying the right treatments at the right time, farmers can significantly reduce crop losses and ensure healthier harvests.
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