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项目目标确定植物生长调节器Actigard和Apogee可合并或单机控制苹果中的火光

项目描述 :During establishment of high-density apple plantings, trees are often pushed to reach the top of the trellis wire by year two.  Vigorous growth can be impacted by the bacterial disease fireblight under warm, wet conditions during bloom.  If a shoot is infected, the disease can quickly spread to the trunk of a high-density tree due to its smaller structure and potentially kill the tree.  As Michigan growers are moving away from traditional orchards to more high-density systems this disease has had a greater impact.  Two plant growth regulators have been shown to suppress fireblight in different ways.  Actigard suppresses fireblight by its SAR stimulus on the apple plant and Apogee is known to suppress fireblight by reducing shoot growth.  This project looked at using Actigard and Apogee alone at different rates, but also in conjunction with each other at different rates and timings to help understand the impact on fireblight control in high density Honeycrisp and Gala trees.  The following treatments were tested:

处理	应用	率(ppm)	全时速率	粉红色	粒子瀑布	10毫米	2ws后	2ws后
UTC
Actigard 1oz/100gal	3	1oz	3oz	X级	X级	X级
Actigard 1oz/100gal	5	1oz	5oz	X级	X级	X级	X级	X级
远地点1oz/100gal	3	1oz	3oz	X级	X级	X级
Actigard1oz3+Apogee1oz3x	3	1oz	3oz+3oz	X级	X级	X级
Actigard1oz5+Apogee1oz3x	5	1oz	5oz+3oz	X级	X级	X级	仅acigard	仅acigard

图1算出用Actigard和Apogee组合处理的Honeycrisp平均生长

图2Gala使用Actigard和Apogee组合处理的平均射法增长结果

项目牵头/协作者Nikki Rothwell和Phil Schwallier

资金来源NWMHR基金会

起始年2018

结束年份2019