{"id":1302,"date":"2020-04-18T10:40:31","date_gmt":"2020-04-18T14:40:31","guid":{"rendered":"https:\/\/blog.uvm.edu\/fruit\/2020\/04\/18\/orchard-management-slow-and-low\/"},"modified":"2020-04-18T10:40:31","modified_gmt":"2020-04-18T14:40:31","slug":"orchard-management-slow-and-low","status":"publish","type":"post","link":"https:\/\/blog.uvm.edu\/fruit\/2020\/04\/18\/orchard-management-slow-and-low\/","title":{"rendered":"Orchard management- slow and low"},"content":{"rendered":"

By Terence Bradshaw<\/a><\/p>\n

Here\u2019s a real quick update. Bud stage<\/a> in warmest Vermont orchard sites is around half-inch green (HIG). At that point, copper should not be applied unless you know the crop is going to cider, as copper applied at any effective rate for this time of year will russet the fruit finish. Frost is expected, again, the next few nights. At HIG, buds are hardy to around 20\u00b0F. I see no immediate issues in that regard. But, frost means that oil and\/or captan should not be used in the orchard, at least until late next week. Early season scab fungicides of choice should be mancozeb or scala\/vanguard. Sulfur, of course, is the main material for use in organic orchards.<\/p>\n

In the Champlain Valley, we\u2019re still closer to green tip for now. That means that copper is still a viable material, but be sure to not apply it after the first two \u201cmouse ear\u201d leaves emerge from the bud. See the bud stage link (above) for a visual. Otherwise, default to those listed above.<\/p>\n

Buds are around silver tip or even dormant in upland and inland sites. Hold tight there, although you could get a prophylactic copper on for fire blight, but that won\u2019t help much against scab.<\/p>\n

BUT, this doesn\u2019t suggest that anyone needs<\/em> to spray. Modeled ascospore development is around 1-7%, more in southern areas. Potential for rain is pretty solid today and fairly spotty until midweek. You need rain and extended wetting to cause infection. Here\u2019s my take: orchard at HIG or later should maintain coverage, especially if you have an orchard that takes substantial time to spray. Time it as close to rain as possible; if you were uncovered going into today\u2019s rain, cover as soon as this rain is done with a protectant + Vangard or Scala for some kickback. If you were covered or are in one of the lower risk sites (decent scab control last year, green tip or earlier bud stage), hold off until we get a better idea of the chance for rain later in the week. Of course, use NEWA<\/a> to keep an eye on scab development in your area.<\/p>\n

Insect notes: if tarnished plant bug is a concern in your orchard (less so in pick your own than wholesale orchards), then get traps up soon. We use white sticky traps from Gemplers or Great Lakes IPM<\/a>. Set three per block, knee-high, on a lower scaffold out in the drive row. Check weekly, giving enough time to apply prebloom insecticide if needed. Trap thresholds are listed in our monitoring guide located here<\/a>. Print that out and out it on your wall in the shop.<\/p>\n

If you\u2019ve had mite or scale problems, think about your options for managing them in the next few weeks. Oil is a great first line of defense, but if you have high populations, especially of scale, you may need to consider adding a stronger material prebloom. Esteem is most recommended for scale, applied around HIG to tight cluster. If mites have been a problem, there are a number of materials available for prebloom use, you\u2019d best check the New England Tree Fruit Management Guide<\/a> for recommendations.<\/p>\n

Be safe out there.<\/p>\n

Terry<\/p>\n

Where trade names or commercial products are used for identification,<\/p>\n

no discrimination is intended and no endorsement is implied.<\/p>\n

Always read the label before using any pesticide.<\/p>\n

The label is the legal document for the product use.<\/p>\n

Disregard any information in this message if it is in conflict with the<\/p>\n

label.<\/p>\n

The UVM Tree Fruit and Viticulture Program is supported by the<\/p>\n

University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM<\/p>\n

Grant, and USDA Risk Management Agency Funds.<\/p>\n","protected":false},"excerpt":{"rendered":"

By Terence Bradshaw Here\u2019s a real quick update. Bud stage in warmest Vermont orchard sites is around half-inch green (HIG). At that point, copper should not be applied unless you know the crop is going to cider, as copper applied at any effective rate for this time of year will russet the fruit finish. Frost … Continue reading Orchard management- slow and low<\/span><\/a><\/p>\n","protected":false},"author":2068,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[],"tags":[36708,107009],"class_list":["post-1302","post","type-post","status-publish","format-standard","hentry","tag-ipm","tag-tree-fruit"],"jetpack_publicize_connections":[],"featured_image_src":null,"featured_image_src_square":null,"author_info":{"display_name":"fruit","author_link":"https:\/\/blog.uvm.edu\/fruit\/author\/fruit\/"},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4nZlV-l0","_links":{"self":[{"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/posts\/1302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/users\/2068"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/comments?post=1302"}],"version-history":[{"count":0,"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/posts\/1302\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/media?parent=1302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/categories?post=1302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.uvm.edu\/fruit\/wp-json\/wp\/v2\/tags?post=1302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}