Psylla will soon be on the move!

Nottingham and Orpet wrote an article in the February 2021 edition of ‘Tree Fruit News’ reminding growers to start preparing dormant sprays of kaolin clay (Surround) to deter pear psylla colonization in the orchard. A dormant Surround spray will provide the first line of defense to keep psylla from entering your orchard. The optimal time to make this first Surround application depends on weather, but here is a good rule of thumb: if it is warm and dry enough for you to safely spray, go for it – psylla are probably colonizing your orchard!

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closeup of two pear buds in the orchard
Picture taken on 3/24/20 of a pear bud just before burst, sprayed at dormant (3/16/20) with Surround CF at 50 pounds/acre. This bud remains protected against oviposition until fresh green tissue ‘bursts’ from within the hard exterior scales.