Apples fall after flowering pests

Pest control after apple falls should be combined with the prevention and control of key pests throughout the year. The main pests and diseases include: apple aphid, gold-grained moth, spotted deciduous disease, mold heart disease, and deficiency of the disease. From a year-round perspective, the diseases and pests that need to be controlled at this time include apple leafhoppers and ringworm disease.

1. Apple's cotton. Occurrence occurs approximately 17 times a year. The 1st and 2nd instar larvae overwinter in the rough ground of the lower part of the tree and in the soil near the main trunk. The activity began in the middle and early April. The spread began in early May. There were two peaks of harm in June and September. . After the apple is dropped, it is a suitable period for prevention and cure. The commonly used pharmaceuticals include 48% of 1500 times of Lethbene, 10% of imidacloprid 2000 times, 5% of acetamiprid 2000 times, and compound preparations. Focus on spraying the trunk.

2. Golden grain moth. About five generations occur each year, and the wintering adults spend their winters in the victim's leaves. The overwintering adults begin to develop in early April, and are harvested at the end of April after the apple is fallen. The subsequent generations of adult occurrences occur in early June, early July, and early August respectively. In late September. In the late period of adult emergence, it is used for controlling the suitable period. The commonly used pharmaceuticals include 50% phoxim 1000 times, 25% diflubenzuron 1500 times, 20% fenvalerate 2000 times. Focus on spraying the back of the leaf.

3. Apple leaf pods. There are three types of leafhoppers: leafhoppers in the mountain, apple claws and two-leafhoppers. Hawthorn leaves occur every 6 to 10 generations, and the adult females overwinter on apple trunks. After falling, the apple climbs to the back of the new leaf of the tree and harms the plants. Apple's all-round clams occur 6 to 7 times a year. They use the eggs to make wintering on the branches of the year, and after the apples fall, they have appeared in the second generation. The occurrence of two-spotted spider mites is similar to that of mountain-planted spider mites. After the apple is dropped, it mainly controls Ruoxue and Chengyu, and commonly used drugs include 15% Zhiling 2000 times, 1.8% abamectin 3000 times, and compound preparations.

4. Moldy heart disease. Mainly occurs in the Red Star series. The pathogen is highly prototypical and it causes wintering in various locations such as orchard trees or weeds, invades the flowering period, and shows symptoms after fruit ripening and harvesting. Prevention of fungal heart disease can be used in the initial flowering period of 40% sulfur suspension 400 times, full flowering time with 10% polyoxoline (Polaroid) 1500 times, after the drop with 50% carbendazim 500 times or 40% Fuxing 8000 times liquid and so on.

5. Alternaria. Mainly occurs in the Red Star series. Pathogens use hyphae to overwinter on victim leaves, shoots and buds, invade the branches for a long time, and can invade many times. After the apple is dropped, it can be treated with 10% polyoxorane (Polaroid) 1500 times, 50% epothilone 1200 times, and 80% mancozeb 800 times.

6. Ringworm disease. Mainly in the Fuji series. The pathogens wintered on the main trunk and sporadized after the spring temperature rose, invading the shoots. Ringworm disease is an important disease of apple, and it should be regularly controlled. Special attention should be paid to early and middle stages of prevention and treatment. The commonly used pharmaceuticals include 80% mancozeb 800 times, 70% thiophanate-methyl 800 times, 80% phosporous aluminum 600 times, 50% carbendazim 500 times, and 40% Fuxing 8000 times.

7. Black spot disease. Occurs only on bagged fruits. The pathogens were overwintering on diseased fruits and diseased leaves, and infected with ring vein disease for 10-30 days after flowering.

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