Seize the opportunity to prevent fruit tree leaf pests

Editor's note: "The plan for the year is spring." In spring, as the temperature rises, pests that have been lying for a long period of winter begin to be active. If we do a good job of prevention and control of pests and diseases at this time, it will play an important role in ensuring high yields of fruit trees throughout the year. Orchard pests and diseases in spring orchards mainly include leaf-feeding pests, apple blossom face disease, apple powdery mildew, pear shell disease, pear rust, and date-feed buds. To this end, this reporter specifically interviewed relevant experts in order to give scientific guidance to the majority of fruit farmers.

Occurrence characteristics

The leaf-feeding pests are severe in management levels and overgrown orchards. This type of pests is scattered over winter. For example, P. striolata, P. vulgaris (larvae), and S. limnophylla (L.) are overwintering in the rough skin cracks of the tree trunk, Z. caerulea (L.) is overwintering in the soil under the trees, and the golden-lined moth is wintering in the fallen leaves. . In addition, the time of the pests is different from morning to evening. Among them, leaf roller moths and leaf leaf moths are generally severely damaged during the spring growing period of fruit trees, while other moths are generally seriously injured after leaf spreading.

Prevention technology

To prevent and treat this type of pests to protect saplings, spring buds, and shoots, we will use non-chemical control measures as much as possible to postpone orchard application.

During the overwintering period, the artificial control completely scraped off the old skin and rough skin, and burned it centrally. Cut out the overwhelming insects of the leaf roller moth. In the period of occurrence, combined with pruning and management of summer orchards, timely removal of insects or pinching of larvae in the cockroach will reduce the occurrence of the base.

The trapping and killing adults placed black lights, sweet and sour liquid pots or various lure attractants in the orchard to trap and kill adult leaf roller moths.

The biological control larvae were sprayed with BT preparations during the incubation period.

Chemical control to catch the overwintering larvae and the first generation of larval hatching hatching two critical period. Drugs can choose phoxim, rosin, avermectin, diflubenzuron 3, kaffold, cypermethrin and so on.

Greenhouse Garden Hydroponics

In a hydroponic system, plants are placed in nutrient-enriched water. Mediums such as gravels, sand or vermiculite can also be used. Thus plants which are placed in the water absorb the nutrients very easly. When the nutrients from the water starts finishing , water is recycled or additional nutrients are added.

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