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Residues of diflubenzuron on horse chestnut ( Aesculus hippocastanum ) leaves and their efficacy against the horse chestnut leafminer, Cameraria ohridella
Author(s) -
Nejmanová Jana,
Cvačka Josef,
Hrdý Ivan,
Kuldová Jelena,
Mertelík Josef,
Muck Alexander,
Nešněrová Petra,
Svatoš Aleš
Publication year - 2006
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.1165
Subject(s) - diflubenzuron , aesculus hippocastanum , gracillariidae , biology , pest analysis , botany , lepidoptera genitalia , insect growth regulator , horse , pesticide , horticulture , larva , agronomy , paleontology
Residues of the insect growth regulator diflubenzuron were quantified on horse chestnut ( Aesculus hippocastanum L.) leaves treated with a diflubenzuron 480 g litre −1 SC, Dimilin. To analyse the samples, an analytical procedure was developed involving a simple extraction step followed by high‐performance liquid chromatography on an octadecyl‐modified silica column with methanol + 0.01 M ammonium acetate mobile phase. The results showed diflubenzuron to be highly stable on horse chestnut leaves; more than 4 months (127 days) after application, 38% (on average) of the insecticide still remained on/in the leaves. The data confirmed biological observations showing diflubenzuron's long‐term efficacy against the horse chestnut leafminer, Cameraria ohridella Deschka & Dimić, which is the most important pest of the horse chestnut in Europe. The hypothesis of possible penetration of diflubenzuron into the leaf mass is explored and discussed. Copyright © 2006 Society of Chemical Industry