At present, it has entered the rainy season. It is the stage of difficult management of watermelon in the summer, and the phenomenon of “dead cockroaches†is easy to occur in production. Promptly carry out pesticide control and reduce losses. The Chinese pesticide network Xiaobian on this issue, collating relevant information for everyone to learn reference:
Watermelon dead mites are diseases caused by soil fax bacteria, which can occur in watermelon seedlings and adult plants, especially in the late growth stage of watermelon, under high temperature and rainy conditions, the incidence is rapid and serious. Generally, the rainy season comes early, the precipitation time is long, and the rainfall is large. The disease is early and the disease is heavy. The peak incidence in the field is often followed by the peak of rainfall, and the temperature can range from 5 °C to 37 °C. According to the pesticide network , the pathogenesis of the leaves produces dark or watery round or irregular shaped lesions. When the humidity is high, it rots or burns like boiling water. When dry, the lesions are light brown and easily broken. On the basal part of the vine, there was a spindle-shaped water-soaked dark green depression, which surrounded the stem and was severely rotted. The fruit develops, forming a dark green circular water-immersed sag, which then rapidly spreads to the whole fruit, causing the fruit to rot, emitting the smell of silage, and the surface of the diseased part is dense white hyphae.
Pesticide control method: From the initial stage of the disease, use 50% nail cream copper wettable powder 700-800 times liquid, 72.2% Plex water 800 times liquid, 64% anti-virus hydrating powder 500 times liquid, etc. Spray once every 7 to 10 days, even spray 3 to 4 times. If necessary, the above liquid can also be used to fill the roots, and each plant is filled with 0.4 to 0.5 liters. If the spray is carried out simultaneously with the rooting, the effect is better.
ASA Copolymer for Extusion Super Cover
ASA resin is a ternary copolymer consisted of Acrylonitrile, Styrene and Acrylate. ASA copolymer integrates acrylates's high impact strength and excellent weather-resistance, chemical resistance and high hardness of acrylonitrile, good processability of styrene. It can be extruded single & coextruded over ABS and PVC. ASA is particularly used in outdoor applications that require long term color stability, excellent weather resistance.
ASA Resin Copolymer, ASA Polymer, ASA Resin PlAStic Polymer
Shandong Novista Chemicals Co.,Ltd (Novista Group) , http://www.novistachem.com