High temperature, high humidity, vegetable disease prevention

In the summer of this year, our province has experienced more frequent and intense hot and rainy weather. This has led to poor vegetable growth and increased vulnerability to pests and diseases. High temperatures and humidity create an ideal environment for root rot, leggy growth, and various plant diseases, which can cause significant damage to crops. High humidity is particularly problematic. When plants are exposed to prolonged high moisture levels, they become waterlogged, leading to weak stems and leggy growth. Eggplants and cucurbits are especially prone to these issues. Over time, the cell walls of the plants weaken, reducing their resilience. This makes them more susceptible to heat stress, resulting in sunburn and reduced yields. Additionally, saturated soil conditions deprive roots of oxygen, increasing the risk of root rot and soil-borne diseases, which can lead to "dead trees" in the field. High temperatures also pose a serious threat, especially to autumn-planted seedlings. Continuous heat not only hinders normal growth, causing wilting and stunted development, but also affects flower bud differentiation, leading to early flowering, fruit drop, and misshapen fruits. This significantly reduces the economic value of the crop. In Shouguang City, where most vegetables are currently in the nursery stage, damping-off and blight are common problems in eggplants and melons. Damping-off is characterized by a water-soaked base that gradually shrinks and collapses. Bacterial infections often appear once true leaves emerge, with symptoms like wilting during the day and stem contraction. The disease incidence is currently high, and other issues like sclerotinia, gray mold, and downy mildew are also present. To manage these challenges, several preventive measures are recommended. Agricultural control includes improving drainage systems, keeping the fields clean, using sunny mornings, and ensuring proper ventilation in greenhouses to regulate temperature. Chemical control involves using smoke agents when humidity is high—such as 20% smoked spirit or 20% fast-smoked tablets in a 200-square-meter greenhouse. After smoking, the greenhouse should be opened the next morning. In clear weather, spraying with 58% metalaxyl or 68% gold mine at 600 times dilution helps prevent dampness and downy mildew. For damping-off, sclerotinia, and gray mold, 50% procymidone at 1500 times or thiophanate-methyl at 1000 times is effective. For solanaceous vegetables, it's important to control watering so that the soil is not overly wet. Avoid excessive moisture to prevent disease at the seedling stage. Treatments like Hymexazol at 2000 times or Root Cork at 600 times can help promote healthy root development. During irrigation, applying Jian Jian Bao at 40–60 kg per acre can also aid in disease prevention. For melon crops, the focus is on controlling growth and boosting yield. Temperature and water management are key—avoiding high-temperature, high-humidity conditions that encourage excessive growth. Nighttime temperature control and increased ventilation support better nutrient transport. Applying potassium fertilizer appropriately can enhance production. For powdery mildew, early application of 10% World High Water Dispersant at 1000–1500 times or 40% DuPont Fuxing at 5000 times is recommended, applied every 7 days for up to three times. Alternatively, heating greenhouses to 42–45°C for two hours at noon can effectively kill pathogens. Leafy vegetables grown in open fields require attention to drainage during heavy rainfall to prevent waterlogging. Diseases like cruciferous soft rot can be controlled with 72% agricultural streptomycin at 4000 times, neophytin at 4000 times, or 77% mancozeb at 600–800 times. Timely harvesting is essential to avoid rain damage and maintain market value. For pest control: 1. Melon locusts: Use 0.6% Excision Ling at 1250–1500 times. 2. Yellow aphids: Apply 90% trichlorfon at 800 times, repeated 2–3 times. Severe infestations may benefit from root irrigation. 3. Diamondback moth: Spray 5% Rui Jin at 1000–1500 times or 5% Suppository EC at 2000 times. 4. Cutworms: Mix 20% wolfberry at 3000 times with 1% insect worm light at 3000 times. By implementing these strategies, farmers can better manage the challenges posed by the current climate and protect their crops from disease and pest damage.

Fire Alarm Type

Fire Alarm Type,Fire Alarm Product,Smoke Alarm,Fire Alarm System

Guangdong Isafenest Co.,Ltd. , https://www.isfenest.com