Early Bloom Brings High Risk Of Freeze Losses

Apple blossom

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Mild weather weather conditions can have a significant effect on tree fruit, according to Cornell University researcher Terence Robinson.

In the latest issue of Cornell’s “Scaffolds” Newsletter, Robinson says the physiology of trees during dormancy is a highly complex phenomenon. The tree’s internal growth inhibitors affect dormancy timing, and early warm temperatures followed by a cold spell can dramatically affect this timing.

To read Robinson’s complete report, including information on using growing degree models, go to http://www.scaffolds.entomology.cornell.edu/2012/SCAFFOLDS%203-19-12.pdf.

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Avatar for Virginia Rinkel Virginia Rinkel says:

Thank you for this information. It is really needed this year in these rising temperatures across the eastern half of the nation. One question – a dormant oil spray was applied this past Sunday 3/18/12 on my apple trees. When can I put the first fungicide on? If it is to be when 1/2" green is showing, it's probably tomorrow, but that's not giving the 10 day span of time needed between the above two applications. Please advise. Thanks.

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