PRE HARVEST GRAY MOLD CONTROL AND FUNGICIDE RESIDUES IN THE HARVESTED STRAWBERRIES

EL-NESHAWY, SANEYA M.; OKASHA, KHALEFA A.; COOK, LINEARD W.

doi:10.21608/ejar.2003.287185

PRE HARVEST GRAY MOLD CONTROL AND FUNGICIDE RESIDUES IN THE HARVESTED STRAWBERRIES

Document Type : Original Article

Authors

¹ Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt

² Faculty of Agriculture, Ain Shams University, Shobra EL-Khiema, Cairo, Egypt

³ Biochemistry Department, NDSU, Fargo, ND. 58105. USA.

10.21608/ejar.2003.287185

Abstract

Protective pre harvest spray of three fungicides i.e. Benlate [Methyl 1-(butyl carbamoyl)-2-benzimidazol carbamatej, Prochloraz [1- (N-propyl-N- (2-(2,4,6 -tri-chlorophenoxy) ethyl) carbamoyl) imidazole] and Vinchlozolin [3 - (3,5 Dichlorophenyl) 5-etheny1-5-methyl-2,4- oxazolidinedione] were applied to Strawberry (Fragaria chiloensis Duchesne var ananassa Baily) (cv. Pajaro) at 0.5, 1, 2 g I ^-1 under either natural or artificial infection. The applied fungicides significantly reduced the level of gray mold caused by Botrytis cinerea. Excellent control was obtained with Vinchlozolin, at the rate of 2.0 g I -' which developed 4.8% and 1.2% rot for two successive years compared with 28.5% and 16.2% in the check under artificial infection conditions. Gas chromatographic detection of Vinchlozolin in treated strawberries revealed residues of 0.0354, 0.3871 and 0.0838 ppm after two days, one and two weeks, respectively, in strawberries treated with 2.0 g '¹.