Journal
CROP PROTECTION
Volume 27, Issue 3-5, Pages 622-631Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cropro.2007.09.004
Keywords
Podosphaera aphanis; pesticide residue; side effects; bicarbonate; mineral oil; fungicide
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Strawberry powdery mildew is a serious disease and its control is based on chemical fungicides. The efficacy of alternatives to chemical fungicides was evaluated and their integration into strategies against strawberry powdery mildew to reduce pesticide residues on fruits was also tested. Bicarbonates and mineral oils were poorly effective. Biocontrol agents (BCAs), like Ampelomyces quisqualis, Bacillus subtilis and Trichoderma harzianum T39, controlled the disease, but to a lesser extent than chemical fungicides. When BCAs were alternated with chemicals, a significant reduction of chemical fungicide residues was achieved while maintaining good powdery mildew control. None of the tested strategies increased populations of the pest Tetranychus urticae, nor had side effects on the beneficial predatory mite Amblyseius andersoni populations and, consequently, they can be regarded as safe for the ecological balance of arthropods in strawberry greenhouses. (C) 2007 Elsevier Ltd. All rights reserved.
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