Open AccessSpruce Spider Mite Control on Christmas Trees in the Mountains of North Carolina, 1987
Author(s) -
W. R. Hobbs,
Fred P. Hain
Publication year - 1990
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/15.1.346
Subject(s) - sprayer , spider mite , randomized block design , block (permutation group theory) , forestry , horticulture , spider , geography , biology , environmental science , mathematics , ecology , agronomy , pest analysis , geometry
Danitol, developed by the Chevron Chemical Co., was evaluated for efficacy in controlling SSM in Aug on a plantation of 8 yr old fraser firs in Ashe County. Using a hand pump sprayer to the point of run-off, 3 application rates were applied and Orthene was used as a standard. A randomized block design was used with 5 blocks of 25 trees selected for each treatment and the controls. Prespray and 10 d postspray counts were made of all living eggs and motile SSM on 3 randomly selected 10 cm twigs taken from different trees within each block.
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