Illinois sees decline in Japanese beetles

Illinois sees decline in Japanese beetles

If you've noticed that your roses are looking healthier than normal, you're not alone.

Japanese beetles are serious pests to roses, birch trees, linden trees and hops, among other plants. The beetles are also going through a serious reduction in numbers throughout Illinois.

University of Illinois Extension Entomologist Phil Nixon said there are fewer Japanese beetles in the state because of the low amount of rainfall last fall.  Nixon added that the downturn is also due to the extreme cold temperatures last winter.



Nixon said that it's unclear whether the trend of fewer beetles will continue next year.



Japanese beetle larvae require approximately 11 inches of water from egg hatch in late July into the fall. In the winter, the larvae die if the soil temperature reaches 15 degrees Fahrenheit or if they are subjected to freezing temperatures for two months.

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Topics (1):Environment

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