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Non‐target effects of commonly used plant protection products in roses on the predatory mite Euseius gallicus Kreiter & Tixier (Acari: Phytoseidae)
Author(s) -
Put Kurt,
Bollens Tim,
Wäckers Felix,
Pekas Apostolos
Publication year - 2016
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4162
Subject(s) - thiacloprid , acetamiprid , thiamethoxam , biology , imidacloprid , toxicology , fludioxonil , indoxacarb , tebuconazole , clothianidin , horticulture , botany , fungicide , pesticide , agronomy
BACKGROUND Euseius gallicus Kreiter & Tixier (Acari: Phytoseidae) is a predatory mite recently available for use against various pests in roses. We tested in greenhouse trials the impact on the numbers of eggs and motiles of E. gallicus of the most commonly used plant protection products in roses in northern Europe: the acaricides acequinocyl and etoxazole, the insecticides azadirachtin‐A, acetamiprid, flonicamid, imidacloprid, indoxacarb, thiacloprid and thiamethoxam and the fungicides boscalid and kresoxim‐methyl, cyprodinil + fludioxonil, dodemorph and fluopyram + tebuconazole. RESULTS The neonicotinoids thiacloprid, thiamethoxam, acetamiprid and imidacloprid had a negative impact on the number of eggs (47, 62, 81 and 76% reduction, respectively, compared with a water treatment) and number of motiles of E. gallicus (42.2, 42.9, 59.9 and 60.6% reduction) and were classified as slightly to moderately toxic. Also, the number of motiles was reduced after treatment with acequinocyl (47%) and etoxazole (43.9%) and after two treatments with flonicamid (41%) with a 1 week interval between treatments. CONCLUSION Azadirachtin‐A, acetamiprid, flonicamid, boscalid and kresoxim‐methyl, cyprodinil + fludioxonil, dodemorph and fluopyram + tebuconazole were harmless for E. gallicus. Special attention should be paid to the impact of neonicotinoids and of acequinocyl and etoxazole, and to the application frequency with flonicamid on E. gallicus . © 2015 Society of Chemical Industry