Apple Aphid Control On Non-Bearing Trees, 1985-86 | Zendy

G. T. Fisher | Zendy

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Apple Aphid Control On Non-Bearing Trees, 1985-86

Author(s) -

G. T. Fisher

Publication year - 1987

Publication title -

insecticide and acaricide tests

Language(s) - English

Resource type - Journals

ISSN - 0276-3656

DOI - 10.1093/iat/12.1.8

Subject(s) - sprayer , randomized block design , aphid , horticulture , nozzle , mathematics , tractor , toxicology , biology , agronomy , engineering , automotive engineering , mechanical engineering

A 2-year study was conducted to evaluate relative efficacy of 3 commercial aphicides on non-bearing trees. Knock-down and residual characteristics of each aphicide were observed. Four, single-tree replicates were used in a randomized complete block design. Applications were made to the point of drip using a tractor-mounted hydraulic single nozzle sprayer delivering 250 psi. Infested terminals were flagged for use in making post-application counts. Dates of applications were 6 Jun and 14 Jun ‘85, 19 Jun ‘86. Trees avg 7 ft. All treatments included Captan 50W at 2 lb/100 gal. Selected terminals were used to evaluate treatments by counting live aphids at 2 and 10 days (1985) and 2 and 22 days (1986) post treatment.

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