It is a common pest that affects a wide range of fruit trees, including apples, pears, peaches, apricots, plums, and grapes. Due to its resilience and difficulty in eradication, it tends to spread rapidly in localized areas, making early detection and management crucial. The following section outlines the damage symptoms, life cycle, and effective control measures for Kinsuke.
First, let's look at the signs of infestation and its life cycle. (a) Damage Symptoms: Kinsuke primarily targets young shoots and leaves with its nymphs and adult females, feeding on sap and causing weakened growth or leaf death. Once an infestation occurs, the pests quickly spread along branches and trunks. If left unchecked, this can significantly reduce fruit quality and yield. (b) Life Cycle: In our region, Kinsuke completes one generation per year. Fertilized female adults survive the winter and become active in late April of the following year. By early May, male nymphs begin secreting wax, forming new shells and developing into adults. Female adults start laying eggs in their shells by late May, and the nymphs hatch in early June. These nymphs then move to the undersides of leaves and shoots, feeding on tender growth. By late July, nymphs mature into females. In early August, males and females mate, after which the males die off. Fertilized females then gather on branches and bark crevices to lay eggs for the next generation.
Second, here are key prevention and control strategies. (A) Before April 30th, manually remove the pests using brushes or by cutting off infested shoots. Apply a 5% diesel emulsion or 5% horticultural oil to kill the females. (B) During the growing season, spray the tree trunks with a 0.3% to 0.5% saline solution to deter infestation. (C) In mid to early May, apply a 800-fold dilution of Lipei (500 times diluted liquid) to target nymphs effectively. (D) In mid to early July, during the nymph stage, spray a 1000-fold solution of phoxim, which has proven highly effective in controlling the population. Regular monitoring and timely intervention are essential to prevent large-scale outbreaks and ensure healthy fruit production.
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