Mitigation of phytotoxicity of fungicide (Bravo) on cranberry fruits and flowers by lysophoshatidylethanolamine (LPE), a natural lipid
M. Ozgen and J.P. Pallta
Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. Abstract S09-O-218. pp. 274.
2002
บทคัดย่อ
Fruit rot caused by fungi is considered ot the one of rhe most yield-limiting problems in cranberry production. Multiple fungicide applications starting at bloom are considered necessary to this problem. Bravo is one of the widely used fungicides to control cranberry fruit rot. However, application of Bravo has been reported to cause a reduction in fruit size as well as scaring damage on fruits. We investigated the potential use of LPE to mitigate undesirable effect of Bravo on cranberry (Vaccinium macrocarpon Ait. Cultivar Stevens) yield, fruit set and size. For this purpose 1 m x 2 m plots were established in cranberry beds at four separate locations with five replications. Plots were sprayed with recommended dosafe of Bravo and LPE (100 and 200 ppm) combinations at 20 and 80% bloom. LPE was applied either 3 hours prior to Bravo or mixed together with Bravo. At late season, fruits and flowers on 50 cranberry uprights wre counted from in each plot to determine the fruit set. At harvest all fruits were removed with a hand rake to determine total yield and other fruits quality parameters. Bravo applications resulted in a 10% decline in fruit set as compared to untreated control. Bravo also resulted in 7% decrease in total yield. Combination of LPE and Bravo mitigated this decline in fruit set and total yield. Application of LPE alone (without Bravo) gave the highest overall fruits set and total yield. The result of the present study shows that LPE can mitigte injury to cranberry flowers and flowers and fruits by Bravo.