Mechanical apple blossom thinning trial

Annex Business Media
July 19, 2017
By Annex Business Media
Cornell Cooperative Extension mechanical apple blossom thinning trial Cornell Cooperative Extension
July 19, 2017 - In 2016, Health Canada’s Pest Management Regulation Agency (PMRA) completed a re-evaluation of carbaryl, a common chemical thinning regime for Canadian apple producers.

The re-evaluation led to some changes and restrictions on the product label. This included eliminating its use in residential areas plus as an insecticide on some fruit and vegetable crops.

Apple thinning has remained on the label but at reduced rates:
  • Maximum seasonal rate of 1.5 kg a.i./ha and an REI of 14 days for hand thinning [high-density trellis production such as spindle or super spindle]
  • Maximum seasonal rate of 1.0 kg a.i./ha and an REI of 17 days for hand thinning [dwarf, semi-dwarf and full-sized trees]
As a result, research is underway to discover a new thinning regime for Canadian apple producers.

Researchers from Cornell Cooperative, CCE Lake Ontario Fruit Program educator and the Lamont Fruit farm conducted a three-year mechanical thinning trial. Watch above for more!

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