The potato leaf lobes began to become smaller from the compound leaves that grew from the heart of the plant, and the difference was different from the lower leaves. The newly grown petiole was upright, and the leaflets were often deformed and the leaves were rough. There are three main types: mosaic type, necrotic type and rolled leaf type. Mosaic type: The leaves are shrunk in severe cases, the whole plant is dwarfed, and sometimes accompanied by veins. Necrotic type: brown necrotic spots can appear in leaves, veins, petioles and branches, stems, and the lesions develop into necrotic streaks. In severe cases, whole leaves die or wilting. Rolling leaf type: The blade turns inward along the main vein or from the edge, and becomes hard and leathery. In severe cases, each leaflet is cylindrical. Control methods: use non-toxic seed potatoes, eliminate diseased potatoes, promote detoxification of shoot tip tissue; improve cultivation measures, implement intensive cultivation, high ridge cultivation, timely soil cultivation, cultivating and weeding, and strictly prevent flood irrigation; avoid partial application of nitrogen fertilizer, increase Phosphorus and potassium fertilizer application; early removal of diseased plants; found that aphids are harmed in time with targeted agents for prevention and treatment. At the beginning of the disease, the targeted drug + new high-fat film + tree guard general disinfection can be used to reduce the infection and replication of the bacteria. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone This 50m distance measuring meter is made of two parts: the laser distance outside unit and the sole part laser measure module. Great distance range is from 3cm to 50 meters with ±1.5mm high accuracy. Digital distance measuring device is quick and reliable measure with one hand pushing the button. It is designed for hand helding, very convenient to put in your jacket pocket or trouser pocket. 50M Laser Distance Measurer,Mini Laser Measurer, Laser Measure 50M,50M Laser Distance Meter Chengdu JRT Meter Technology Co., Ltd , https://www.jrt-measure.com
1>. Easy to Use. It is very easy to learn how to use a Laser Distance Meter, it can measure distance with pressing a single button.
2>. Safety. Using a laser distance meter to measure is much safer than using a measure tape, for users do not need to climb up and down.