Quince Insect & Mite Pests
Codling moth damages quince fruit directly by boring into fruit. Larvae either “sting” fruit, boring only a short distance into the flesh, or bore into the core of a fruit and consume the seed cavity. Codling moth only develops between temperatures of 50°F to 88°F. (UC IPM website, 2014).
Twospotted Spider mites appear on fruit leaves at the bottom of the canopy after warmer weather begins, then gradually spread throughout the rest of the canopy. Mites only feed on leaves, but affect fruit by reducing photosynthesis and defoliating trees. Pre-harvest defoliation results in smaller fruit, while postharvest defoliation can affect the following year’s fruit. In both cases defoliation can result in a late fall bloom and dramatically reduce flowering in the following spring. Twospotted spider mites can be effectively controlled by other beneficial insects & mites. If insecticides are used to prevent other pests beneficial insect populations can also be reduced, resulting in spider mite infestations (UC IPM website, 2014)
These photos are accessed from the UC ANR Repository, are available courtesy of University of California research and extension personnel and programs, including the UC Statewide IPM Project.