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Out of the citrus rust tick prevention and control
To improve the effectiveness of **pesticides** in controlling citrus rust mites, it's essential to avoid blind application and instead focus on strategic use. Using "insurance drugs" without proper timing can increase costs, harm the environment, and promote pesticide resistance. Moreover, applying pesticides at the wrong time may miss the optimal control window, making the treatment ineffective.
Effective rust mite management requires regular pest monitoring. Farmers should select 3–5 orchards and inspect 3–5 plants per site, checking 10–20 fruits randomly. Each fruit should be examined under a microscope for 10–20 times, with four fields observed per fruit. If the average number of mites per field exceeds two, or if more than 20% of the fruit surface is infested, immediate action is necessary. With 18–20 generations per year, early suppression of each generation is crucial to prevent population outbreaks.
Long-term use of single acaricides, such as dicofol or omethoate, not only harms the environment and crop quality but also kills beneficial natural enemies. Prolonged use leads to resistance, reducing the effectiveness of these chemicals over time. Even new pesticides may initially work well, but continuous and repeated use can lead to the survival and proliferation of resistant individuals, eventually making the pesticide ineffective.
The **pesticide network** recommends alternating between 2–3 different types of new acaricides. For example, you can use 34% fenpyroximate emulsifiable concentrate (diluted 2000 times), 1.8% abamectin emulsion (1500 times), 5% chlorfenapyr emulsifiable concentrate (800 times), and 80% zinc sulfate solution (800 times). Apply these products in the late afternoon for better coverage and effectiveness. Make sure to spray both the upper and lower surfaces of leaves and fruits to maximize contact with the pests.
Using broad-spectrum pesticides that kill natural enemies, such as copper-based fungicides (e.g., green milk copper, copper ammonium, DT) or bacterial pesticides (e.g., streptomycin, Yingsaifeng, bacteria poison clear), can significantly reduce populations of *Trichogramma sinensis*, which play a key role in controlling rust mites. Similarly, pyrethroid insecticides like quick kill or Nisolang may harm beneficial insects such as ladybugs and predatory mites, leading to an increase in rust mite populations.
It’s best to apply these pesticides during dry and hot periods when natural enemies are less active. For instance, 10% mancozeb can be used for citrus rust, 25% imidacloprid for scale insects, 50% carbendazim for anthracnose, and 25% acephate for psyllids.
Finally, timely drought-resistant irrigation is critical. Lack of water not only reduces plant resilience to mites but also hinders the reproduction and activity of *T. sinensis*. Ensuring adequate moisture helps maintain a balanced ecosystem and supports natural pest control mechanisms.