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GRAPE PHYLLOXERA
University of Kentucky — Root galls are knot-like swellings on the rootlets, and may lead to decay of infested parts. In the fall, nymphs migrate to the roots where they hibernate through the winter. The following spring they become active again and produce the root ...More…
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GRAPE PHYLLOXERA
University of Kentucky — Root galls are knot-like swellings on the rootlets, and may lead to decay of infested parts. In the fall, nymphs migrate to the roots where they hibernate through the winter. The following spring they become active again and produce the root ...More…
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Grape Phylloxera
University of California IPM — The majority of grape phylloxera adults are wingless females. They are generally oval shaped, but those that lay eggs are pear shaped. They are small (0.04 inch long and 0.02 inch wide) and vary in color from yellow, yellowish green, olive green, ...More…