Octopus,Frozen Squid Flower,Long-Legged Octopus,High Quality Frozen Squid Tube Zhoushan Haiwang Seafood Co., Ltd. , https://www.haiwangseafoods.com
Potato Disease and Insect Pest Control Technology
I. Physiological Diseases
Physiological diseases in potatoes are caused by environmental factors that hinder their normal growth and development. These include nutrient deficiencies, adverse weather conditions, and phytotoxic effects. Proper management is essential to prevent and control these issues.
Control measures include:
1. Applying sufficient NPK and organic fertilizers as base fertilizer to ensure balanced nutrition.
2. During the root and foliage growth stages, foliar spraying with a detoxifying and balanced nutrient solution such as Effective Microorganisms (EM) or similar products can help improve plant health.
3. In cases of phytotoxicity, cold damage, or high-temperature stress, it is recommended to spray such foliar fertilizers 2–3 times for better recovery.
II. Fungal Diseases
Early blight, also known as summer blight or ring disease, primarily affects the leaves. The symptoms appear as small, circular, dark brown spots with concentric rings, which may merge into irregular large lesions. The lesions are not water-soaked.
Control methods:
1. Improve cultivation practices, avoid excessive nitrogen application, and maintain proper soil fertility to reduce disease occurrence.
2. At the early stage of infection, apply a 70% Antai solution diluted 600 times or a 43% Holoca solution diluted 5000 times.
Late blight, commonly referred to as "rickets," is one of the most destructive potato diseases. It affects leaves, stems, and tubers, often appearing after flowering. Initially, the lesions are tan and unstructured, but when wet, they expand rapidly, developing water-soaked edges and white moldy growth. On the underside of the leaves, dense white mold appears, forming a "mold wheel." When dry, the lesions become brittle and lose the mold layer. Late blight spreads quickly under continuous rain and high humidity, causing severe yield losses within 10 days.
Control strategies:
1. Plant resistant varieties.
2. Use certified disease-free seed potatoes.
3. Apply chemical treatments: Remove infected plants immediately, apply lime on the ground, then spray 66.8% Mefenoxam at 600 times dilution or 72% Previcur at 800 times dilution around the infected area. Repeat after 10 days, and use 70% Azoxystrobin at 600 times dilution for protection.
III. Insect Pest Control
Locusts:
1. Seed treatment with insecticides before planting.
2. Use natural barriers and cultural practices to avoid pupae development.
3. Apply insecticides such as Aimi Le (15,000–30,000 times dilution) or Kangfu (over 8,000 times dilution) to kill locusts.
Cicadas (Loudetia):
1. Use baits made from 90% trichlorfon mixed with chopped cabbage or fried bean cake powder (0.1 kg per 1.5 kg bait per acre) to trap and kill them.
2. Apply 5% phoxim granules (1–1.5 kg per acre) in furrows or use 80% dichlorvos EC (30 times dilution) to irrigate holes.
Ground beetles (Tiger beetles):
1. Strengthen field management and remove weeds.
2. Use light traps or vinegar pots to capture adult beetles.
3. For larvae, spray 2.5% cypermethrin at 1,000 times dilution or mix 2.5% trichlorfon powder with fine soil (2.5 kg per 10 kg soil) and apply around the plants. For older larvae, apply 50% phoxim EC or 80% dichlorvos EC to the roots.
Potato tuber moths:
1. Enforce strict quarantine measures.
2. Use insect-free seed potatoes and avoid growing solanaceous crops like tobacco consecutively. Cultivate the soil to prevent tuber exposure.
3. Monitor pest emergence and apply pesticides during the larval stage to control infestations effectively.
Proper monitoring, timely intervention, and integrated management are key to reducing the impact of these diseases and pests on potato crops.