First, the disease conditions Potato bacterial wilt is an important disease of potatoes. High temperature, high humidity, and rainy areas are more serious. Planting diseased seed potatoes, or planting in continuous crops, low-lying areas, and soils with acidity are prone to disease.
Second, the symptoms of the symptoms In the early stage of the disease, the lower leaves were wilting during the day, and recovered in the evening. After 2 days, they no longer recovered, and gradually developed from the bottom to the top. After 4 days, the stems and leaves of the diseased plants died.
Third, the prevention and treatment methods (A) can not be continuous with the Solanaceae plant, with rice rotation for better disease prevention. (2) Strengthening cultivation management. Choose high-quality, well-drained fields for planting; apply organic fertilizer and increase potassium fertilizer; acid soil, 50-75 kg of lime per acre before tilling, so that the soil is slightly alkaline, which can reduce the incidence. (3) Chemical control. Irrigation with roots, once every 7 days, even 2 to 3 times, each plant with 0.25 kg of liquid has a good disease prevention effect. Commonly used agents are 50% carbendazim 700 times solution, 1000 times solution, 20% lime water. (College of Agriculture, Jiangxi Agricultural University)
Excerpted from: Henan Science and Technology News
【Comment】 【Print this article】 【Close this page】 【Large, medium and small】

80m Handheld Laser Distance Meter

HIGH ACCURACY&STABILITY - Using laser precision technology, accuracy up to ±3mm, measurement distance extends up to 80m. Switchable between Ft / In / M for free adjustment.

LCD BACKLIGHT AND MUTE SETTING - The backlight screen gives you better visibility in dark areas. With the mute function, you can switch the acoustic signal on or off as you wish. Suitable for use in libraries, classrooms, and other quiet locations.

MULTIPLE MEASUREMENT FUNCTIONS - area, distance, length, volume, continuous measurement, pythagorean method - three points; Addition and subtraction. The laser rangfinder is ideal for home, construction and industries, especially in large areas such as rooms, apartments, buildings, real estates, factories, warehouses, etc.

80m Handheld Laser Distance Meter,indoor outdoor laser distance measurer,outdoor distance measuring equipment

Chengdu ZT Electronics Technology Co., Ltd. , https://www.lasermeasuretool.com

Posted on