Corn is not immune to yield loss until physiological maturity occurs. However, it is not nearly as vulnerable during late reproductive stages. This article includes a chart which should substantially help assess the risk of potential corn yield reduction during late reproductive stages. . . . → Read More: Vulnerability of Corn to Late-Season Issues?
Incomplete kernel set is something you can’t ignore. These kernels often don’t fill because the plant can’t supply enough energy to support them. Therefore, if we want to improve our yields, we need to investigate reasons why the kernel set is less than desired, so we can improve in the future. . . . → Read More: Why did the Kernels near the Ear Tip not Fill?
Additional bacterial blight has been observed in the MS cotton production system. At present, 12 counties have been reported to contain infected cotton. . . . → Read More: Cotton Bacterial Blight Update: July 18, 2014 (UPDATED 7/21/2014)
Several calls have come in this week regarding random yellow spots in cotton fields. While there are a multitude of things that may cause this, there seems to be an underlying theme in many cases. Everyone is aware of the rainfall we have received this year. As a result of season long moisture levels, oxygen supply . . . → Read More: Random Yellow Spots in Cotton Fields
Bollworm moth counts were up sharply across the state this week, so higher bollworm larval pressure should be expected over the next 1-2 weeks. Southwestern corn borer counts were high in Quitman, Tallahatchie and Leflore counties, but low elsewhere. Most corn is past the vulnerable window, so only late-planted corn that has not reached dough stage should . . . → Read More: Trap Counts, July 18, 2014
Maintaining clean and weed-free field roads around sweetpotatoes is thought to help minimize rodent injury and make access for crop scouting and monitoring more efficient. Roads are most often maintained weed-free with glyphosate applications. However, off-target movement of glyphosate onto adjacent sweetpotato plants can be problematic.
Sweetpotato vines exposed to glyphosate often exhibit chlorotic/yellow leaves and stems . . . → Read More: Glyphosate Injury to Sweetpotatoes Adjacent to Field Roads
White sugarcane aphids (WSCA) have been blowing up quickly to treatable levels in several counties in Mississippi. Over the last few days here have been several field requiring treatments likely with more coming. Because this is a new pests for Mississippi, we have been following the lead of our colleagues in Texas and Louisiana who dealt with this in 2013. Below are some criteria that we put together based on what we know to date that will help in making a decision to treat WSCA. . . . → Read More: Treating White Sugarcane Aphid: Decision Aid
Foliar corn diseases continue to be observed throughout MS. Even though common rust, gray leaf spot, northern corn leaf blight, and southern corn leaf blight continue to be observed at low levels, additional diseases have been encountered over the past two weeks. . . . → Read More: Corn Disease Update: July 14, 2014
Numerous fungicide trials were conducted during the 2013 season to determine the effectiveness of some popular commercially available fungicides on managing frogeye leaf spot. Attached find data as related to some R5 and one R5.5 fungicide application on a frogeye leaf spot susceptible Maturity Group IV variety in Stoneville (4 trials) and Starkville (1 trial). . . . → Read More: Managing Frogeye Leaf Spot with Fungicides: 2013 MS Trial Data
Populations of the white sugarcane aphid are expanding and increasing across the state. We have confirmed the presence of white sugarcane aphid in grain sorghum in 7 counties in Mississippi (Fig 1) and there are likely more. The counties where white sugarcane aphids have been found include Bolivar, Washington, Humphreys, Quitman, Panola, Tunica and Oktibbeha. . . . → Read More: White Sugarcane Aphid Update and Impact on Midge Applications