Common Pests of West crabapple
West crabapple, as a traditional famous and valuable ornamental plant, pest control is an important part of the maintenance process that cannot be ignored. This article systematically sorts out the characteristics and corresponding solutions of the two major pest types: piercing-sucking and leaf-eating. By adopting a strategy of prevention + control, it helps you protect the healthy growth of crabapple.
Control Strategies for Piercing Pests
Characteristics of Apple Aphid Pest
Overwintering eggs hide in the crevices of the branch epidermis, and after hatching in spring, the larvae densely damage the tender leaves of the new shoots. From May to June, there is a peak period of winged aphids, which can be预警 through observing honeydew secretions on the back of leaves. It is recommended to spray lime sulfur solution in early spring before germination to destroy the overwintering environment of the eggs.
Outbreak Pattern of Red Spider Mites
This pest uses bud scales as a breeding ground for laying eggs, and reproduction accelerates after the temperature rises in June, reaching a peak in July. The leaves will show dense yellow and white spots, and in severe cases, it can lead to premature defoliation. Regularly rinsing the back of leaves can physically remove the pests, and releasing predatory mites can be more effective.
Comprehensive Control Plan
In winter pruning, focus on removing branches with pest galls, and spray 5% heavy oil emulsion in early spring. Daily maintenance can involve hanging yellow sticky traps to monitor pest density, and natural enemies like ladybugs and lacewings can reduce pest occurrence by more than 50%.
Leaf-Eating Pest Response Plan
Characteristics of舟形毛虫 Pest
In mid-to-late July, the peak period of adult emergence, they have a strong phototactic behavior, and the larvae gather to eat the leaf flesh, forming transparent net-like spots. You can collect pupating larvae by tying grass bundles around the tree trunks and use Bacillus thuringiensis biopesticides for control.
Control Techniques for Leafroller Moth
Overwintering larvae hide in silk cocoons at the top of the branches, causing growth stagnation of new shoots. It is recommended to cut and burn the infested shoots during winter pruning, and hang pheromone traps during the growing season. The natural control rate of parasitizing wasps on larvae can reach over 65%.
Ecological Control System
Establish a plant diversity environment, intercropping with pest-repelling plants such as mint and rosemary. Using frequency vibration insect killing lights can reduce the mating rate of adults by 70%, and combining manual removal of egg masses forms a three-dimensional control network.
Scientific control of West crabapple pests requires mastering the three key points: seasonal patterns, biological control, and physical removal. It is recommended to establish a monthly inspection system, focusing on controlling piercing pests in spring and strengthening the monitoring of leaf-eating pests in summer and autumn. By cultivating strong plants and ecological regulation, the pest resistance of crabapple can be significantly improved, allowing the beautiful crabapple to be free from pest damage.