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What are the damage characteristics and living habits of the jujube leaf mite?

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The jujube leaf mite is commonly known as gray leaf disease, fog disease, fire dragon, etc. It damages the leaves, flowers, and fruits of jujube trees as adults and nymphs. The damaged leaves turn grayish-white, the mesophyll thickens and becomes brittle; in severe cases, the leaf epidermal cells necrose, losing photosynthetic capacity, and the leaves curl and drop easily. Damaged flower calyces cannot bloom. The jujube leaf mite produces more than 3 generations per year, overwintering as adults or nymphs within the bud scales of jujube spurs. This pest has three damage peaks per year, namely late April, late June, and mid-July, each lasting 10-15 days. It begins in early August

The jujube leaf mite is commonly known as gray leaf disease, fog disease, fire dragon, etc. It damages the leaves, flowers, and fruits of jujube trees as adults and nymphs. The damaged leaves turn grayish-white, the mesophyll thickens and becomes brittle; in severe cases, the leaf epidermal cells necrose, losing photosynthetic capacity, and the leaves curl and drop easily. Damaged flower calyces cannot bloom.

The jujube leaf mite produces more than 3 generations per year, overwintering as adults or nymphs within the bud scales of jujube spurs. This pest has three damage peaks per year, namely late April, late June, and mid-July, each lasting 10-15 days. It begins to move into the crevices of bud scales for overwintering in early August.

What are the main measures for controlling the jujube leaf mite?

(1) In winter, manually remove and search for overwintering adults and nymphs of the leaf mite.

(2) Spray according to the three damage peaks: 80% trichlorfon at 800-1000 times dilution; 1605 diluted 2000 times, or 25% phosmet at 1500-2000 times dilution.

(3) Before bud break, spray 5-degree lime sulfur mixture. In arid regions, combining irrigation under the tree with water spraying on the tree can also reduce damage.

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