Apple, Seasonal Insecticides Test, 1976
Author(s) -
H. Reissig,
D. H. Dunham,
Harold E. Hebding
Publication year - 1977
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/2.1.24
Subject(s) - sprayer , randomized block design , horticulture , white (mutation) , canopy , biology , greening , leafhopper , botany , toxicology , hemiptera , agronomy , ecology , gene , biochemistry
Sprays were applied dilute to run off with a hand sprayer (450 psi) petal fall through 6th cover sprays on May 2 1 , June 2 , June 16, June 2 9 , July 15, August 3 , and August 18. Each treatment was replicated 3 times on 6 tree plots (Mcintosh, Cortland, Rhode Island Greening, Golden Delicious, and Red Rome) arranged in a randomized block design. At harvest 150 Mcintosh and 100 Cortland apples were scored from each replication. White apple leafhoppers were counted on 25 randomly selected spur leaves from a Rhode Island Greening tree in each replication. The number of leaves infested with spotted tentiform leafminers was also recorded on these trees during a search from the ground to eye level once around the outer circumference of the canopy.
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