What are the damage characteristics and living habits of jujube leaf tick
Jujube leaf tick is commonly known as gray leaf disease, fog disease, fire dragon and so on. It uses adults and nymphs to harm jujube leaves, flowers and fruits. The injured leaves are gray and white, the mesophyll thickens and becomes brittle, when the leaf epidermis is necrotic, the photosynthetic capacity is lost, the leaves curl and fall easily, and the calyx can not bloom after being killed.
The jujube leaf tick occurs for more than three generations a year, overwintering as adults or nymphs in jujube bud scales. The insect has three damage peaks in a year, that is, the end of April, the end of June and the middle of July, each lasting 10-15 days. In early August, it began to turn to the gap of bud scales to overwintering.
What are the main measures to control jujube leaf tick?
(1) artificial removal and search for overwintering adults and nymphs of leaf tick in winter.
(2) spraying according to the three peaks of its damage, 80% trichlorfon 800ml 1000 times, 1605 dilution 2000 times, or 25% imidophos 1500-2000 times.
(3) spraying 5-degree stone-sulfur mixture before germination and spraying water on trees combined with irrigation under trees in arid areas can also reduce the damage.
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Control of plum peach borer
The symptoms are that the hatched larvae eat into the fruit from the base of the pedicel, eat the food along the core, and paste the gum out of the wormhole and the brown feces excreted by the insect body on the fruit surface, so that the feces of the borer overflows and is unedible. The control method is in the peak spawning period of the first and second generation adults from April to May, when most of the eggs on the fruit turn red, spray 2.5% deltamethrin 2500 times, 50% phoxim EC 1000 times, 40% omethoate 1000 times.
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Peach variety: Xiayuan No. 1
The Institute of Horticulture of Jiangsu Academy of Agricultural Sciences was bred by Zhaohui × Zhaoxia hybrid. The original code was 75Mel 8Mel 6, which was named in 1985. The average weight of a single fruit is 130 grams, and the maximum fruit weight is 210 grams; the peel is milky yellow in color, with a rose blush at the top; the pulp is white to creamy yellow and has a sweet flavor; soluble solids 9%, 10%. Sticky core. The tree is strong and half-open. All kinds of fruit branches can bear fruit, many compound flower buds and high yield. But the pollen is sterile, so it is necessary to configure pollination trees. In Zhengzhou area of Henan Province
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