One of the main pests affecting Cylindrozos punctata is the green-blind cricket, along with the juvenile cricket mosquito and the jujube turtle wax. Spider mites, Zaojiao, and P. minors may also appear occasionally, but their damage is generally minor.
Secondly, comprehensive prevention and control measures should be implemented based on the characteristics of the circular bollworm jujube in the county. Due to the scattered planting patterns and small plots, it's important to focus on integrated pest management, with a strong emphasis on chemical control when necessary.
(I) Dormant Period Prevention
During dormancy, there are four favorable conditions for controlling pests: 1) overwintering sites are more concentrated, and the insect population has a uniform age structure. 2) jujube trees are dormant, which makes them more resistant to pesticides, allowing the use of high-concentration sprays. 3) the trees have lost their leaves, making it easier to apply treatments and save time and materials. 4) the long dormancy period provides ample time for effective control.
To enhance tree health and resistance, proper fertilization and irrigation should be carried out. Intercropping should be done wisely—Zaoyuan is best suited for wheat and peanuts, while avoiding crops like cotton, corn, and soybeans, as they can support the spread of pests such as A. lucorum.
Scraping the bark is another effective method. Many pests overwinter under the bark, so carefully scraping and burning the removed bark can help eliminate them. Afterward, applying a lime solution (2:1:200 ratio of lime, salt, and water) can disinfect and protect the tree from cold damage.
Cutting off infested branches and dead wood during winter shearing helps reduce pest populations. Burning these materials can kill overwintering eggs and larvae.
Soil around the tree trunk should be turned before freezing. Excavating the top 1 meter of soil to a depth of about 20 cm exposes overwintering larvae to freezing temperatures or natural predators.
Manual brushing using tools like wooden sticks or shoe soles can remove adult female jujube wax insects. Spraying diesel emulsion with a high-pressure sprayer, followed by beating the branches after 30 minutes, can also be effective.
Mulching under the tree can prevent adult emergence and reduce future infestations.
(B) Growth Period Control
During the growing season, it's essential to protect and encourage the presence of natural enemies such as predatory spiders, red dot ladybugs, and long shield gold wasps.
Chemical control should follow the "green plant protection" concept. Based on pest reports, group prevention and control should be conducted over large areas, focusing on specific pests like aphids.
In early April, when the average daily temperature stabilizes above 10°C, spray 4.5% beta-cypermethrin at 1500 times dilution, or 2.5% kappamile at 2000 times, or 10% imidacloprid wettable powder at 3000 times. This helps control the first generation of green nymphs.
In mid to late April, when jujubes begin to sprout, spray 4.5% beta-cypermethrin (1000–1500 times) combined with 10% imidacloprid (2000 times), or 48% Rostime (1500 times) to target the first generation of juvenile mosquito larvae. Repeat every 7–10 days, up to two applications, achieving a control rate of over 95%.
In early May, spray again during the peak of green-clear nymphs, and treat for red spider infestations if needed.
In early July, depending on the pest forecast, spray 40% culling at 2000–3000 times, or 25% dying net at 800–1000 times during the peak of juvenile wax larval emergence. This also helps manage red spiders and peach shoot borers. If infestations are severe, repeat the spray every 10–12 days, with up to two applications, achieving a control rate of over 97%.
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