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United States Department of Agriculture

Agricultural Research Service

Title: Organic Techniques to Control Disease Damage and Improve Fruit Quality in Apples Using Surround Crop Protectant

Authors
item GLENN, D. MICHAEL
item Gundrum, Patricia
item PUTERKA, GARY

Research conducted cooperatively with:
item Engelhard Corporation

Submitted to: American Society of Agronomy
Publication Type: Abstract Only
Publication Acceptance Date: October 1, 2003
Publication Date: November 4, 2003
Citation: GLENN, D.M., GUNDRUM, P.G., PUTERKA, G.J. ORGANIC TECHNIQUES TO CONTROL DISEASE DAMAGE AND IMPROVE FRUIT QUALITY IN APPLES USING SURROUND CROP PROTECTANT. AMERICAN SOCIETY OF AGRONOMY. 2003.

Technical Abstract: Studies were conducted to evaluate the effects of a new crop protectant, Surround WP, that is made from processed kaolin-based alone and together with sulfur (S) and lime-sulfur (LS) on the incidence of insects and diseases in apples (Malus domestica Borkh.). Greenhouse studies demonstrated that either S (0.5%) or LS (0.5%) alone or in combination effectively controlled apple scab and the addition of processed kaolin (6%) did not interfere with the efficacy of the sulfur minerals. Based on these experiments, field studies evaluated the effect of Surround WP and S + LS, alone and in combination, in comparison to an untreated control and conventional pesticide control. Powder mildew [Podosphaera leucotricha (Ell. & Ev.) E.S. Salmon (anamorph Oidium farinosum Cooke)] russeting on fruit and apple scab [Venturia inaequalis (Cooke) Wint. (anamorph Spilocaea pomi Fr.)] were suppressed by the sulfur minerals alone or in combination with kaolin. Codling moth [Cydia pomonella (L.)] and plum curculio [Conotrachelus nenuphar (Hbst)] were most effectively suppressed by the kaolin and combination of sulfur minerals treatment. San Jose scale [Quadraspidiotus perniciosus (Comstock)] damage was increased by Surround WP alone and moderately suppressed by Surround WP and S + LS. The combination of kaolin with sulfur minerals provided disease and insect control equivalent to the use of conventional fungicides and insecticides except for the control of San Jose scale.

Last Modified: 7/28/2014
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