Degree Day Calculation

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.

Oak Wilt

Oak wilt can be lethal, especially to oaks in red oak group. Learn about this disease of oaks, the life cycle and management options.


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.

Garden Spiders

Spiders are good guys to gardeners, since they feed on other insects. There are a few main groups that are commonly found in gardens. To learn more about these fascinating arthropods, read this article…

Powdery Mildew – Trees & Shrubs

Powdery mildew is a disease that occurs on the above-ground parts of many deciduous trees and shrubs, as well as herbaceous ornamental plants, indoor houseplants, and many agricultural crops. Learn more in this factsheet.


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.


White blobs of bubbles on plants are created by the insects called spittlebugs, and their foam helps protect them. To find out more about these creatures, read this article…

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