Cornell Carbohydrate Model Results for May 8, 2017

We are continuing to experience unusually cold weather across the state, and growers will need to continue to wait for a thinning window.
Cornell Carbohydrate Model Results for May 8, 2017 - News

Updated: August 8, 2017

Cornell Carbohydrate Model Results for May 8, 2017

The latest model run was completed at 9:30 AM this morning. In general the conditions for this week are not favorable for thinning, with highs predicted in the upper 50s to mid-60s. Three sites in PA had an hourly temperature below freezing which may result in some fruit damage. There is also a risk of cold damage for Tuesday morning. Cooler temperatures are not conducive to the use of 6-BA products. The preferred choice of a thinning material is carbaryl. The addition of an NAA product may help thinning in areas that might experience temperatures in the 70s. The predicted 4 day average balance suggests that chemical thinner rates should be increased as indicated by positive averages.

Apple Carbohydrate Thinning Models for Pennsylvania Counties

For more information on the carbohydrate thinning model, visit Carbohydrate Thinning Model. For more details on factors that affect plant growth regulator performance and chemical thinner rates, visit Growth Regulators in Apple and Pear Production.

Instructors

Deciduous Tree Fruit Production Tree Fruit Rootstocks Pruning and Training Tree Fruit Apple Varieties Tree fruit nutrition Asian pear varieties Impact of climate change on tree fruit production

More by Robert Crassweller, Ph.D.