{"id":765,"date":"2018-08-13T15:45:42","date_gmt":"2018-08-13T23:45:42","guid":{"rendered":"http:\/\/agsci-labs.oregonstate.edu\/vegnet\/?p=765"},"modified":"2018-12-05T09:27:28","modified_gmt":"2018-12-05T17:27:28","slug":"whats-wrong-with-the-broccoli","status":"publish","type":"post","link":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/2018\/08\/13\/whats-wrong-with-the-broccoli\/","title":{"rendered":"What’s wrong with the broccoli? – UPDATE"},"content":{"rendered":"

UPDATE 23-AUG
\n<\/span><\/p>\n

Some current hypotheses<\/strong> (from processors, OSU plant clinic, researchers, growers, field reps):<\/span><\/p>\n

1. The damage may have been caused by heat stress during a critical time of development. In May and again in July, there were extreme variations of temperature: <\/span><\/p>\n

\n \"\"\n
Max daily temperature fluctuation in critical periods of seedling\/transplant development likely contributed to poor growth observed this season<\/figcaption>\n <\/figure>\n

2. Auxins are phytohormones known to regulate growth processes in plants, and can spike rapidly in response to heat-shock. Increased auxin levels can ‘present’ as abnormal root growth or phototropism, which was noted at some of the sites:<\/span><\/p>\n

\"\"<\/p>\n

As auxins move throughout the plant, the gradient shifts and, at least in other types of plants, declining levels causes leaves or petioles to break off. I don’t know much about abscission zones in broccoli, so if you are still reading, please know that these are just my rambling thoughts, and not an official diagnosis. \ud83d\ude42<\/p>\n

3. Another possibility is that young plants were sensitive to residual carryover from synthetic auxin herbicides (2,4-D, Dicamba, Fluroxypyr) remaining in the soil, which is possible with a grass-brassica rotation.<\/span><\/p>\n

\n

Recently, there has been some concern about odd symptoms of wilting and reduced stands in broccoli and cauliflower here in the Willamette Valley. See photos below.<\/p>\n

Symptoms include: Weakened stems – necrosis of lower leaves – poor stand – girdling\/calloused tissue at soil level – stem breakage – possible association with weed hosts – abnormal root growth<\/p>\n

NOTE: AT THIS TIME, I HAVE ONLY EDUCATED GUESSES OF WHAT MIGHT<\/u> BE CONTRIBUTING FACTORS<\/strong> TO THE FOLLOWING SYMPTOMS IN BRASSICA FIELDS. THIS ISSUE IS CURRENTLY UNDER INVESTIGATION IN CONJUNCTION WITH FIELD FACULTY AND DIAGNOSTIC LABS. <\/em><\/span><\/p>\n

Thanks for your interest\/input. <\/em><\/span><\/p>\n

\"\"<\/p>\n

\u00a0<\/em><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

UPDATE 23-AUG Some current hypotheses (from processors, OSU plant clinic, researchers, growers, field reps): 1. The damage may have been caused by heat stress during a critical time of development. In May and again in July, there were extreme variations of temperature: 2. Auxins are phytohormones known to regulate growth processes in plants, and can… Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":8003,"featured_media":0,"comment_status":"open","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":[1252991,1409],"tags":[],"class_list":["post-765","post","type-post","status-publish","format-standard","hentry","category-brassicas","category-community"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8vBJ4-cl","_links":{"self":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts\/765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/users\/8003"}],"replies":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/comments?post=765"}],"version-history":[{"count":10,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts\/765\/revisions"}],"predecessor-version":[{"id":817,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts\/765\/revisions\/817"}],"wp:attachment":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/media?parent=765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/categories?post=765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/tags?post=765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}