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项目目标:确定ethphon和两片开花含果材料对青树摘除效果

项目描述 :种植者传统上高速使用 gephon(GA)消除非带状树果实。此策略在过去25年中一直成功,但近些年来PGR没有完全消除果实并导致树覆盖,树耗竭概率较高。2018年,设计试探测试ephon切除果的不同速率和时间。Ethephon应用五大时间(1次)。^stwhite, 50% bloom, 100% bloom, petal fall and shuck split) and four different rates (50ppm, 100ppm, 200ppm and 400ppm) to 5 year-old Montmorency tart cherry trees at the NWMHRC.  Treatments were applied with a hand-gun sprayer to four single tree replicates.  Blossoms were counted on 15 May 2018 on branches with greater than 150 flowers.  Branches were clearly marked and we returned to count the number of fruit on 19 June 2018.  Fruit quality was measured on 12 July 2018 for weight, brix and pull force.   In 2019, the ethephon treatments were refined based on 2018 data and included blossom caustic materials.  Ethephon was applied at four rates: 100ppm, 200ppm, 400ppm, and 800ppm and at two timings: first white – full bloom (23 May) and full bloom – petal fall (29 May).  Ammonium thiosulfate (ATS) and lime sulfur oil (LSO) were applied at late bloom (23 May) and early petal fall (29 May) at 2%, 4%, and 8%.  Fruit set was collected in the same manor as in 2018 but we also included a damage rating because the caustic materials caused significant leaf burn.  In 2020, we analyzed return fruit set in the ATS and LSO treated trees.

项目牵头/协作者Nikki Rothwell和Todd Einhorn

资金来源密歇根樱桃委员会

起始年2018

结束年份:2020