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Detailed Explanation of the Occurrence Patterns and Control Techniques of the Jujube Leafroller

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The jujube leafroller belongs to the family Tortricidae, order Lepidoptera. The jujube leafroller damages the leaves, flowers, and fruits of jujube trees, seriously affecting the yield and quality of jujube. The jujube leafroller has a single feeding habit, only damaging jujube trees and wild sour jujube, with larvae feeding on jujube leaves, flowers, and fruits. It produces 3 generations per year, overwintering as pupae in cocoons under old cracked bark and in clods of soil around the trunk. In the following year, eclosion begins in late March, with the peak of eclosion in early April; adults are strongly phototactic, and eggs are laid singly on smooth twigs and leaves. The first-generation larvae hatch in early May (before the Beginning of Summer)

The jujube leafroller belongs to the family Tortricidae, order Lepidoptera. The jujube leafroller damages the leaves, flowers, and fruits of jujube trees, seriously affecting the yield and quality of jujube.

The jujube leafroller has a single feeding habit, only damaging jujube trees and wild sour jujube, with larvae feeding on jujube leaves, flowers, and fruits. It produces 3 generations per year, overwintering as pupae in cocoons under old cracked bark and in clods of soil around the trunk. In the following year, eclosion begins in late March, with the peak of eclosion in early April; adults are strongly phototactic, and eggs are laid singly on smooth twigs and leaves. The first-generation larvae hatch in early May (before the Beginning of Summer), mainly damaging jujube buds and tender leaves, and eclose in early to mid-June (after Grain in Ear); the second-generation larvae appear in late June (around the Summer Solstice), mainly damaging flower buds, tender leaves, and young fruits, causing a large number of young fruits to drop, and the adults eclose in late July; the third-generation larvae hatch in late August, mainly damaging leaves and jujube fruits. In late September, the larvae mature, spin cocoons, pupate, and overwinter.

Control measures:

1. In winter and spring, scrape off the old cracked bark, burn it in a centralized manner, and eliminate the overwintering pupae.

2. During the adult emergence period, use the phototaxis of the adults and black light lamps to trap and kill the adults.

3. After autumn, before the larvae enter overwintering, grass can be tied around the trunk to attract overwintering larvae to pupate, and they can be eliminated in a centralized manner.

4. Chemical control: For the first-generation larvae in mid-May and the second-generation larvae in late June, spray 25% diflubenzuron No. 3 at 1500 to 2000 times dilution, or 75% phoxim at 2000 times dilution for control. The main focus is on eliminating the first-generation larvae, which is the key to controlling this pest.

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