Picking up pests and fruits, and intensively destroying the bad dates left on the ground are mostly pest dates, which contain a large number of pests (eggs) and germs. The fallen leaves on the ground are also diseased leaves (jujube rust, etc.). Those that are not picked up in autumn should be cleaned up in time in spring, and taken out of the ground for centralized destruction to prevent re-infestation of pathogens or eggs.
Spraying the lime sulfur mixture before the germination of the jujube tree can eliminate some of the pests and germs that overwinter; spraying 30% Longdeng Fulian Suspension Concentrate 400~600 times liquid, or 77% Duoning WP 300~400 times liquid, or 60% Tongjia wettable powder is 300~400 times liquid, and 20% Kuailing 1000 times liquid is added at the same time to eradicate the overwintering fungus source and overwintering pests of the tree, and the effect is better.
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Red Star apple variety originated in the United States and was introduced to Qingdao in 1982. It is mainly distributed in Jiaonan, Laixi, Pingdu, and Jimo. It is one of the main apple varieties grown in Qingdao. The average weight of a single Red Star apple is 190 grams, with some reaching up to 500 grams, and the fruit shape index is around 1, with a conical shape. The fruit surface is smooth, with thick wax, abundant bloom, deep and wide calyx cavity, and prominent five ridges. When the fruit first turns red, there are distinct intermittent red stripes, followed by a red blush, and when fully colored, the whole fruit is deep red with prominent purple-red coarse stripes, a glossy surface, and light brown or gray-white fruit dots. The flesh is pale yellow, crisp, juicy, and sweet.
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