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Abstract ▼ AI-Helper

Thrips are among the most important pests of asparagus. The most effective method to control this pest is to insecticides spraying. Currently, a total of 114 pesticides have been registered for the control of pests of asparagus, 60 of which are registered for thrips control. However, crops are harv...

Thrips are among the most important pests of asparagus. The most effective method to control this pest is to insecticides spraying. Currently, a total of 114 pesticides have been registered for the control of pests of asparagus, 60 of which are registered for thrips control. However, crops are harvested every day, applying insecticides to control thrips is not ideal. Moreover, a recent study has shown that depending on the type of registered insecticide used, less than the residual or quantitative limit could be detected at 3 - 5 days after spraying. Therefore, if the asparagus is harvested after the application of insecticides, it should be stored in a cold chamber for 3 or more days before being moved to market. The use of sticky traps to control thrips is effective not only for monitoring them but also for reducing their numbers without applying insecticides. Yellow and blue sticky traps were usually used, but the yellow traps have been shown to attract more thrips than the blue ones. A recent study showed the high insecticidal effects of carbon dioxide on adult and larval thrips, at 60% concentration (20°C for 24 hours) or 40% concentration (24°C for 24 hours). Soap was also shown to have a high insecticidal effect after thrips-infested asparagus was immersed in soap water (diluted 1,000 times) for 15 minutes. Entomopathogenic fungi, such as Beauveria bassiana and Lecanicillum attenuatum, which occur naturally in soil, also help to reduce the initial thrips population by attacking the pupae in the soil in the spring harvest period.

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