Apple deciduous disease is caused by brown spot and physiological leaves. In the severely hazardous years, a large number of leaves of apple trees will be caused, and the fruit of the tree will not be ripened, which will have a significant impact on the formation of flower buds and the yield and quality of the fruit. In particular, the brown spot disease of apples mainly affects the leaves, and can also be infiltrated with fruits. The leaf spots of the leaves are brown spots at the beginning, and then develop into larger lesions. The fruit surface of the fruit is initially brownish spots, gradually expanding to 6-12 mm or irregular brown spots, concave, and black small spots on the surface. The flesh of the diseased department is brown and has a sponge-like dry rot. Pathogenesis: The pathogens overwinter on the leaves with hyphae or conidia discs. The conidia produced in spring are splashed with rainwater onto the leaves closer to the ground, becoming the primary source of infection. Moisture is a necessary condition for the spread of germs and the production of conidia, and the diseased leaves of the desiccant have no ability to produce conidia. The general incubation period is 6-12 days, and it usually takes 13-55 days from the invasion to the diseased leaves. Conidia are reinfested by wind and rain. Control methods: prevention and treatment are generally based on chemical protection, combined with the removal of fallen leaves, can effectively control the incidence, the key is to master the spraying time. 1. Chemical control. Starting from the first half of the first half of the disease, that is, in mid-June, the new high-fat film was sprayed three times in mid-August; the young saplings were sprayed once in early May, early June, early July, and combined with the prevention and control of anthrax in the rainy year. Spray 1 time. 2. Agricultural control. Strengthen cultivation management, enhance tree potential, and improve disease resistance; soil orchards with high groundwater level should pay attention to drainage, and pay attention to plastic trimming. After trimming, use callus anti-corrosion film to seal the cut to prevent wound rot. The tree is ventilated and light-transmitted; the leaves are collected in autumn and winter, and the ploughing leaves in winter can reduce the source of overwintering 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
Grow
lighting can be one of the most essential factors to successful plant
production in a commercial greenhouse because grow lights help to lighten shady
spots and propagation areas in the greenhouse. If you are growing tropical
plants, you may need to set up grow lights if the plants don't get at least
eight hours of sun each day. Most crops benefit from supplemental lighting,
when increased growth and quality is converted into added revenue. We provide Growing Light and complete systems for
your greenhouses.
Greenhouse Growing Light,Greenhouse Grow Lights,Plant Grow Lights,Greenhouse Plant Lights JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.skyplantgreenhouse.com