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Articles by Kelly Seuhs
Managing Alfalfa Weevil Insecticide Resistance - Oklahoma State University
Published Nov. 2023|Id: EPP-7102 For alfalfa producers, damage by alfalfa weevil threatens both short- and long-term economic goals. Defoliation, reduced yield and quality are immediate concerns. In addition, loss of yield in the current crop, inhibition of growth in subsequent cuttings, increased susceptibility to disease and early weed encroachment can further decrease stand life. Insecticide resistance has become a major issue in many alfalfa producing states.
Oklahoma Pecans: Managing Sting Bugs and Leaffooted Bugs
As the pecan season starts to wind down, shuck-split and harvest is starting to take place in earlier maturing cultivars. A hot summer with lack of moisture has played havoc on this seasons’ crop development, especially in native groves. While pecan weevil emergence has been light in most areas, as harvest approaches growers must still be on the lookout for stink bug and leaffooted bug activity. Stink bug and Leaf-footed bugs are a potential problem late in the season.
Oklahoma Pecans: Getting Ready for Pecan Weevil Season
With the majority of early season insect pests behind us it is time to start thinking about pecan weevil. Now is the time to prepare for the emergence of weevils that can infest this season’s crop. Damage from pecan weevil can vary from year to year and orchard to orchard. Also, susceptibility to this pest can vary from tree to tree in a home yard situation.
Oklahoma Pecans: Don’t Forget Hickory Shuckworm
The past couple of years weather events (e.g., late freezes and ice storms) have created problems for pecan growers. Decreased crop loads forced commercial growers to make management decisions on seasonal insecticide and disease applications. Due to lack of crop load, many growers decided to save the cost by not spraying.
Oklahoma: Pecan Nut Casebearer Time Is Here
Time is drawing near to begin monitoring for Pecan Nut Casebearer (PNC). If producers have not ordered PNC pheromone traps it is time to do so. As a general rule for southern and central Oklahoma, traps should be in the orchard by the first week of May. The key to using pheromone traps is to get them out early in order to detect the onset of flight. The initial date of collection, when moths are captured (on 2 consecutive nights) will act as a biofix for predicting egg laying (oviposition).
Oklahoma Pecans: Late Season Insect Pests
Pecan producers are nearing the end of the production season. Shuck-split in early maturing cultivars is at hand, with harvest to begin shortly. Pecan weevil season has been somewhat sporadic. Normal peak for Pecan Weevil in Oklahoma is mid to late September. Early August rain events caused emergence in areas that received significant moisture prompting insecticide applications by late August, while other areas receiving less rainfall may have not seen any emergence, yet.
Oklahoma: Pecan Weevil Season Is Here - 15 Steps for Management
Pecan weevil season is in full swing across the state. Our “normal” peak in weevil occurs in mid to late September; however, due to heavy rains that occurred in several areas of the state early to mid-August, weevil emergence (especially in sandier soils) began early and could continue into October. Damage from pecan weevil can vary from year to year and orchard to orchard. This insect represents one of the major pecan pests that can severely limit production and quality of the pecan crop.
Managing Alfalfa Weevil Insecticide Resistance
By Kelly Seuhs For alfalfa producers, damage by alfalfa weevil threatens both short- and long-term economic goals. Defoliation, reduced yield and quality are immediate concerns. In addition, loss of yield in the current crop, inhibition of growth in subsequent cuttings, increased susceptibility to disease and early weed encroachment can further decrease stand life. Insecticide resistance has become a major issue in many alfalfa producing states.
Oklahoma Wheat, Alfalfa: Army Cutworms Reported in Some Fields
Wheat field with army cutworms injury. Photo: Sug Farrington, Cimarron County Extension, Oklahoma Several people, including Lanie Hale, Rob Anderson, and Mike Rosen of Wheeler Brothers and Area Extension Agronomist Heath Sanders have reported possible army cutworm activity. These reports are based on direct observations and noticeable crow and blackbird “gatherings” in some wheat and alfalfa fields in areas of western Oklahoma.
Oklahoma Alfalfa: Fall Army Worms are Here Until We Get a Frost
As the weather moderates and temperatures turn cooler alfalfa growers must remain vigilant in monitoring newly planted and existing alfalfa stands for fall armyworm (FAW) presence. Reports from late August indicated high FAW activity in many summer crops including pasture and alfalfa. Current reports from around the state continue to indicate fall armyworm activity in these crops as well as newly planted wheat.
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