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This diseases and disorders chapter from the Extension Gardener Handbook discusses how to keep plants healthy through cultural practices. The types of plant pathogens including: fungi, bacteria, nematodes, viruses, and parasitic plants are discussed. Strategies are reviewed for managing diseases using an integrated pest management approach.
This factsheet describes the biology of the Callirhytis gall wasp, which infests the twigs and leaves of many species of oaks.
This factsheet describes the biology of the detachable woolly leaf gall wasp, Andricus quercuslanigera, and provides residential management recommendations.
This factsheet describes the biology of the witchhazel leaf gall aphid, Hormaphis cornu, and provides residential management recommendations.
This factsheet describes the biology and management of the cypress twig gall midge, Taxodiomyia cupressiananassa, which infests bald cypress and pond cypress.
This factsheet describes the biology of the rhododendron gall midge, Clinodiplosis rhododendri, and provides residential management recommendations.
This factsheet describes the biology of the oak vein pocket gall midge, Macrodiplosis quercusoroca.
This factsheet describes the biology of the willow bladdergall mite, Aculops tetanothrix, and provides residential management recommendations.
This factsheet discusses the biology and control of ocellate gall midges, which cause red and yellow spots on the surface of red maple leaves.
This factsheet describes the biology of the pine needle gall midge, Thecodiplosis brachynteroides, and provides residential management recommendations.
This factsheet describes dogwood eyespot galls caused by an ocellate gall midge, Parallelodiplosis subtruncata.
This factsheet describes the biology of midges in the genus Macrodiplosis, which cause vein "pocket" galls on the leaves of oaks.
This factsheet describes the biology of pitch gall midges or resin gall midges in the genus Cecidomyia.
This factsheet describes the biology of the hickory peach gall midge, Cariomyia persicoides, and provides residential management recommendations.
This factsheet describes the biology of the cypress flower gall midge, Taxodiomyia cupressi, and provides management recommendations.
