Apple pests are a widespread problem that affects various fruit trees, including apples, pears, peaches, apricots, plums, and grapes. Among these, the Kinsuke pest is particularly challenging to manage due to its rapid spread and tendency to infest large areas in certain regions. This article provides an overview of the damage caused by Kinsuke, its life cycle, and effective prevention and control methods.
First, let's understand the symptoms and occurrence patterns of Kinsuke. The main damage is caused by nymphs and adult females, which feed on sap from leaves and branches, leading to weakened growth, yellowing or dying leaves, and even stunted development of fruit. Once an infestation occurs, it can quickly spread throughout the tree, especially along branches and trunks. If left unchecked, this pest can significantly reduce fruit quality and yield.
In terms of its life cycle, Kinsuke completes one generation per year in our region. Female adults that have been fertilized survive the winter and become active again in late April of the following year. By early May, male nymphs begin to secrete wax and form new shells, eventually becoming adults. Female adults start laying eggs in their own shells around late May, and the nymphs hatch in early June. These young insects then move to the undersides of leaves and shoots, where they feed on sap and cause damage to young foliage. By late July, nymphs develop into female adults, and by early August, males die off after mating. Fertilized females then gather on branches, twigs, and bark crevices, preparing for the next season.
To prevent and control Kinsuke, several measures can be taken. Before April 30th, mechanical removal or manual brushing is recommended to eliminate adult insects. Infested shoots should also be pruned and destroyed. Spraying with a 5% diesel emulsion or 5% mineral oil emulsion can help control the population. During the growing season, applying a 0.3% to 0.5% physiological saline solution to the trunk can also be effective.
In mid to early May, spraying with a 800-fold dilution of Lipei (500 times diluted liquid) is advised. In mid to early July, when nymphs are in the hatching stage, applying a 1000-fold solution of phoxim has shown significant results in reducing infestations. Regular monitoring and timely intervention are key to managing Kinsuke effectively and protecting fruit crops from damage.
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