Open AccessPear, Prebloom Control of Pear Psylla with Pyrethroids, 1987
Author(s) -
Helmut Riedl,
Peter W. Shearer
Publication year - 1988
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/13.1.50
Subject(s) - pear , horticulture , orchard , biology , botany , nymph , mathematics
Sprays were applied dilute by handgun operating at 200 psi to 14-yr-old pear trees. Test plots consisted of 4 single-tree replicates in a randomized block. Treatments consisted of single sprays applied on 18 Mar (delayed dormant) or two sprays applied on 18 Mar and 8 Apr (white bud). Treatments were evaluated by beating-tray counts of PP adults (2 trays/tree) and counts of PP eggs and nymphs on 5 spurs/tree.
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