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Submit your digital sample via P&PDL's app. The Plant Diagnostic Sample Submission app is a joint effort with 8 universities to provide a way to easily submit digital images of plant problems or pests on the go. Available for iOS.
|CHILL HOUR INFORMATION:
Learning more about chilling hours (pdf). Purdue University Extension: Facts for Fancy Fruit article.
Many plants become dormant during the cool season. If the cool season is not cool enough for a long enough period, many fruit-producing plants have a difficult time knowing when to overcome dormancy. Like growing degree-day units that are used to track temperature differences over a certain threshold over a period of time, chilling hours offer a way to track length of exposure to optimum dormancy temperatures. This is an article from 2012 that explained chilling hours in more detail and how the mild winter and warm spring was expected to impact various crops that are dependent upon chilling hours.
|Chilling Hours/First Frost from Texas A&M AgriLife.|
|Chilling Requirements of Selected Peach Varieties, Leaflet No. 327 of North Carolina Cooperative Extension Services.|
|Chill requirements for fruit types and estimated chill hour map, at Raintree Nursery website.|