Prevention methods of camellia gray mold
Camellia gray mold occurs in the buds and leaves of Camellia. The pathogen is Botrytis cinerea, and the diseased parts appear light brown spots. After bud infection, they cannot open normally and lose their ornamental value. When severe, buds and apical buds rot and fall off. In the large humidity, lack of light, nitrogen fertilizer, plant growth are vulnerable to disease. Control methods: In the autumn, winter, and spring seasons, attention should be paid to ventilation and light transmission to avoid excessive humidity. Even in rain and snow weather, the air inlet must be ventilated every day for 4 to 5 hours to evaporate the water droplets on the surface of the blade and the leaf edge. . The diseased camellia plants should not be put on pots. Infected plants should be sprayed with protective fungicides, such as 75% chlorothalonil 500 to 600 times, 70% thiophanate-methyl 600 times, 50% carbendazim 500 times, etc., 2 sprays in the autumn and 1 spray in the early winter. , Spray 1 time in early spring, that is, there are obvious special effects. Natural pigments are food pigments obtained from natural resources. Pigments extracted mainly from animal and plant tissues and microorganisms (cultures), in which vegetative colorants predominate. Natural pigments not only have the function of coloring food, but also have physiological activity. At present, there are 48 kinds of edible natural pigments approved to be used in China, commonly used chili red, beet red, monascus red, cochineal red, gaolianghong, sodium copper chlorophyllin, turmeric, gardenia yellow, carotene, algal blue pigment, cocoa pigment, caramel pigment and so on. Roselle Calyx Extract,Phycocyanin,Lutein,Butterfly Pea Flower Powder,Beta Carotene Powder,Sodium Copper Chlorophyllin Xi'an Gawen Biotechnology Co., Ltd , https://www.amulyn-bio.com