Control of strawberry fruit-rots by fungicides and determination of their residues in The harvested fruits

Abstract: Spraying strawberry plants with any of the following fungicides, dichlofluanid (Euparen) 50% WP, iprodione (Rovral) 50% WP and procymidone (Sumisclex) 50% WP resulted in significant reduction of the natural infection with fruit-rots with significant increase to the marketable fruits compared with control treatment. Significant variations were observed in the rate of fruit-rot infection and the fruit yield due to the effect of the tested fungicides and the growing season.
The residues of the tested fungicides (mg a.i./kg fruits) in the harvested fruits were gradually decreased by increasing the interval following spraying.. Slow degradation of dichlofluanid 50% WP was observed in and on the fruits five days after application. Then fast dessipation occurred until complete disappearce of the residues after 45 days. On the other hand, the degradation of iprodione 50% WP and procymidone 50% WP was faster in the first week then turned to be slower but their residues were still detected at the 45th day.
Refering to the Maximum Residue Limits of the Codex Alimentarius Commission indicating 10 mg/kg for each of the fungicides under experiment on strawberry fruits. The Pre-Harvet Intervals (Pill's) of dichlofluanid 50%WP, iprodione 50%WP and procymidone 50%WP are 7, 2 and 3 days, respectively. Human consumption of strawberries following the identified withholding periods would be safer and reduce the risk for consumer health.
According to the agricultural practices, the strawberry fruits are harvested every 3 days. For this reason, the use of dichlofluanid should be restricted to be applied 7 days (Pill) before start collecting the strawberry fruits and not permitted for application during the harvesting season. Iprodione and procymidone having shorter Pill's 2 and 3 days which enable using them during the harvesting season.
Publication year 2006
Availability location 7 شارع نادى الصيد - الدقى - الجيزة(المعمل المركزى لتحليل متبقيات المبيدات والعناصر الثقيلة فى الأغذية)
Availability number
Organization Name
Department Pesticides Residue Analysis
Author(s) from ARC
External authors (outside ARC)
    Abada K.A. Department of Plant Pathology - Faculty of Agriculture - Cairo University
    M.A. Mostafa Department of Plant Pathology - Faculty of Agriculture - Cairo University
Agris Categories Pests of plantsProtection of plants - General aspects
Proposed Agrovoc Strawberries--Disease;fungicide residues;
Publication Type Journal
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