http://www.uwex.edu/ces/ag/plantdoc/ Cases for UWEX Cooperative Extension PlantDOC Wed, 25 Nov 2009 04:36:54 CST en-us http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=14044 http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=14044 Wed, 11 Nov 2009 04:14:10 CST A 4 acre corner of a 40 acre field is exhibiting bouquet ear syndrome with multiple ears per shank. Pulling the husks back reveil a few kernels at most per ear. An occasional plant (5% of total) have near normal developed ears. The majority of the area will not produce any yield. This is a corn field following several years of soybeans. I was told by the seed rep that Aim was used as a burndown with soybeans the year before followed by Roundup. Lumax was apparently applied to corn this spring at 2nd leaf stage. Planted May 5th, and a 98 day maturity variety with several trait stacks. Noticed the soil in this area of the field to be wetter than the rest of the field. I took a video with much greater detail of what the field looks like but will need to find a method to get on-line. http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13998 http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13998 Wed, 23 Sep 2009 11:11:42 CST The symptoms shown in the pictures are showing up in various situations in Marinette & Oconto Counties this year. Most severe symptoms are on corn on corn on the drier soils. The pictured plants are from a field of Garst hybrids, in which about 60% of the plants exhibit some degree of these symptoms. Only areas without symptoms are on moister soils. I know that there are fungal leaf spot issues, but am mostly concerned about the interveinal chlorosis and what may be interacting to cause that. http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13829 http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13829 Wed, 12 Aug 2009 03:36:07 CST Field planted no-till on 6/4/09 following a burn-down of GlyStar Plus several days earlier. Corn following alfalfa. Good rains following planting resulting in an excelent stand. Laudis applied on 7/8/09. Corn is currently 2 to 6 ft tall depending on location in field. From my obvservations I think that planting depth is the primary reason for lack of uneven plant growth. Some plants were planted as shallow as 1/2 inch. Lack of root development also has resulted in what appears to be K defficiency. Carrie? Chris, What impact might Laudis have on plant growth? Other comments? http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13744 http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13744 Wed, 15 Jul 2009 05:42:35 CST Directed seed oats, no companion crop. Droughty conditions. Farmer has cut and baled some already as feed for beef cows. Would like to cut and bale this field too. Is this loose smut and if it safe to feed to his beef cows? http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13673 http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13673 Wed, 01 Jul 2009 10:17:36 CST A spray pattern is not noticable. However, injury is more severe in low areas of the field and somewhat closer to the neighboring corn field. A photo of a single plant is now posted. Foliar injury to soybeans. RR soybeans planted early-May into corn stubble. Corn in 08 was sprayed with 2.3 oz GMax Lite and 3 oz Hornet. Soybeans sprayed early June with Roundup PowerMax. Neighboring farm to the south sprayed corn with a mixture containing 2,4-d one week before symptoms occured. High humidity, high temps, and heavy fog occured after application. Neighbors corn shows curling of corn plants while soybeans were also injured showing cupping and wrinkling. Could the 2,4-d from the neighbors farm have caused this or could some carry over from the Hornet be a possibility? Does not look like sudden death syndrome as plants appear to be growing out of it. Other thoughts? http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13545 http://www.uwex.edu/ces/ag/plantdoc/viewCase.cfm?cid=13545 Thu, 04 Jun 2009 01:25:39 CST Corn planted late April into soybean stubble. Herbicide is G-max lite at 12 oz/acre and clarity. Only seed treatment was Apron. Corn plants are missing in two areas of field. No carcasses or underground leafing-out found. Very difficult to even find seed in furrow. Seed that was found is well rotted. Planting depth is ok. Sandy soil.