Deciduous Tree Galls

Galls are abnormal growths on plants that can result from the feeding of living organisms such as bacteria, fungi, nematodes, insects and mites. Learn about common galls in this factsheet.

Maple Gall Mites (Eriophyidae)

Inside little green or red bumps or other weird growths on maple leaves are tiny eriophyid mites, feeding on the developing gall tissue. Learn more about these mites and what to do about them in this article on maple gall mites.

Calculating Degree Days

Degree Days incorporate temperature and time to quantify the rate of plant and insect development. This useful tool helps predict events such as flowering, harvest, and pest outbreaks.

Phenology

Phenology is a branch of science that studies the life cycles of plants and animals with seasonal changes and weather. Learn more in this factsheet.

Scales

There are many species of scales and they are difficult to control because of their protective covering. Learn to identify and manage scales in this factsheet.

Scale Insects

Scale insects are often overlooked because they are immobile and look like small bumps that just might be plant parts. Learn more about this group of inconspicuous and atypical insects in this article…

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