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Rabbiteye Blueberry Field Trials with the Growth Regulator CPPU

机译：生长调节剂CPPU的Rabbiteye蓝莓田间试验

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摘要

The growth regulator CPPU [N-(2-chIoro-4-pyridyl)-N'-phcnylureaj has recently been shown to increase both fruit set and berry size in rabbiteye blueberries (Vaccinium ashei Reade) in Experiment Station research plots. In order to validate these findings, several field experiments were conducted during 2001 and 2002 on eommercial farms across south Georgia with the rabbiteye cultivars 'Climax' and 'Tifblue'. The standard CPPU concentration used was 10 mg/L applied at 10 to 18 days after 50% bloom. In2001, most CPPU applications were with a back-pack sprayer, but in 2002, applications were made using commercial air-blast sprayers. In general, results from both years showed a positive benefit of CPPU with respect to fruit set, especially for the cultivar 'Climax'. Depending on location and year, fruit set was increased by as much as three-fold for 'Climax'. Fruit set increases were also observed for 'Tifblue', but the effect was less pronounced. With respect to berry size, CPPU generally increased 'Climax' size by 12 to 22% in both years. Berry size increases were observed for 'Tifblue', although, responses were not as consistent as for 'Climax'. A slight delay in fruit ripening sometimes occurred for CPPU treated plants. These results suggest thatCPPU may be useful for increasing yield of rabbiteye blueberries by increasing fruit set and/or berry size.
机译：最近在实验站研究区显示，生长调节剂CPPU [N-（2-choro-4-pyridyl）-N'-phcnylureaj可增加兔眼蓝莓（Vaccinium ashei Reade）的坐果率和浆果大小。为了验证这些发现，在2001年至2002年间，在佐治亚州南部的商业农场进行了一些野外试验，其兔眼品种为“ Climax”和“ Tifblue”。 50％水华后10到18天使用的标准CPPU浓度为10 mg / L。在2001年，CPPU的大多数应用是使用背装式喷雾器，但在2002年，使用商用鼓风喷雾器进行了应用。总的来说，这两年的结果都表明CPPU在坐果方面有积极的好处，特别是对于'Climax'品种。根据地点和年份的不同，“高潮”的坐果量增加了三倍。还观察到“ Tifblue”的坐果增加，但效果不太明显。在浆果尺寸方面，CPPU通常在两年中将“高潮”尺寸增加了12％至22％。尽管'Tifblue'的浆果大小有所增加，但反应却不如'Climax'一致。 CPPU处理过的植物有时会稍稍延迟果实成熟的时间。这些结果表明，CPPU可通过增加坐果和/或浆果大小来提高兔眼蓝莓的产量。

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