Major hazards (1) Leaves of vegetables are prone to dehydration, curling and shedding. (2) High temperature is often associated with photocameras, long-term bright light irradiation of fruits and vegetables, the sunny side of the fruit will be sunburn; high temperature and drought will affect the fruiting results of solanaceous fruits, beans and other vegetables; drought easily lead to Chinese cabbage Dry heartburn, tomato umbilical rot and other physiological diseases. (3) Diseases such as virus disease, powdery mildew, and mites are aggravated.
Countermeasures (1) Watering. Choose early morning or evening, use well water or low-temperature river water, and pour water thoroughly to keep the soil moist. Conditional sprinkler or leaf spray can be used. (2) Fertilization. According to the types of vegetables, varieties and the needs of different growth periods, the rational application of nitrogen, phosphorus and potassium fertilizers. (3) cover cooling. Shroud covered shade nets, and stalks were scattered between rows of crops. For bare fruit, cover weeds, old newspapers, and other items. (4) Control pests. Common diseases include leafy soft rot, viral disease, downy mildew, melon downy mildew, anthracnose, epidemic, wilt, legume powdery mildew, rust, wilt, virus disease, eggplant early blight, Late blight, bacterial wilt, gray mold, virus disease, etc. Common pests include Plutella xylostella, Pieris rapae, Beet armyworm, Spodoptera litura, Yellow-legged flea beetle, Liriomyza spp., Aphids, and so on.
JRT OEM Digital Laser Range Finder can measure faster, easier, and more effectively! Our Professional R&D team has over 16 years of experience on the laser and measurement field , so we can supply perfect OEM/ODM service according to user requirement ,and we have made out the mini size module in the world.
The handheld laser distance measurer can measure distance,area,volume and pythagorean, and can switch to meter/feet/inch mode as you like.
Specially, there is three best-sale styles:
* Mini: D30 with our mini module U81 in it achieved the smallest size Laser Distance Meter in the world, which outlook is the same as a key,quite portable and cute. USB chargable design.
* Bluetooth: Diy Laser Range Finder With Bluetooth has been used to measure distances accurately in the both daily usage and industry application. The handheld laser distance measurer is widely used in variety areas, like project surveying, construction measuring, railway application etc.
* Longest: 150m equipped with a precise,easy- to-read digital LED display, which metal case brings you great hand feel.Power Supply: 2 x 1.5V AAA batteries.
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Chengdu JRT Meter Technology Co., Ltd , https://www.cdlaserdistancemodule.com