Blog Archives

Potato Leafhopper, Hopperburn, and Christobal

The Gulf tropical depression Christobal has been making headlines with heavy rains experienced in the South and expected in parts of the Midwest. But there is more than just rain that arrives with these storm systems; they also carry migratory

Posted in Forages

Warrior II with Zeon Technology® Approved for Control of Crane Flies in Alfalfa

In 2019, we reported that an alfalfa field was affected by crane flies in Muhlenberg County. Similar issues have been observed this year in the same field. Alfalfa plants showed signs of severe injuries to stems, foliage, and roots. A

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Begin Scouting Fields for Alfalfa Weevil

The UK Ag Weather Center’s degree day model for alfalfa weevil indicates that some counties in southern Kentucky have exceeded the 190DD used as a starting point to begin scouting. Other counties will exceed that total within the next few

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Don’t let This Weevil Eat Your Alfalfa Profits

The earliest field crop pest of the year is often the alfalfa weevil. While adults do some leaf notching, larvae (Figure 1) attack buds and developing leaves, reducing yield and quality of alfalfa. Last year, high numbers were observed in

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Tropical Soda Apple – An Invasive Plant Threat Found in Kentucky

Be on the lookout for an introduced invasive plant recently found in Kentucky.  A homeowner in Hopkinsville, Kentucky contacted the Christian county Extension Agent for Horticulture about a unique plant discovered in her home landscape area.  The plant identified as

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Watch for Fall Armyworm in Pastures

Fall armyworm is a recurring pest of pastures, and there have been several outbreaks in pastures the past few years. As we move into autumn, risk of fall armyworm moving into Kentucky from southern areas increases. Growers managing pastures should

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Fly Species that Thrive on Decomposing Organic Matter and Moist Environments Stand Out in the 2019 Planting Season in Different Crop Systems

Since mid-March until the beginning of May, reports, inquiries, and personal observations on the presence of several worms or flying insects that are becoming abundant on alfalfa, wheat and tobacco have caught my attention. All these fly species feed on

Posted in Forages, Grains, Tobacco

Crane Fly Larvae Might Be on the Rise in Soggy Alfalfa Fields

Problem A sample of alfalfa plants from Muhlenberg County was submitted by Darrell Simpson (Agriculture & Natural Resources Agent in Muhlenberg, KY) to the Plant Disease Diagnostic Laboratory at the University of Kentucky’s Research and Education Center in Princeton on

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Ideal Spring for “Hopperburn” on Alfalfa

Potato leafhopper (PLH) is a key pest of spring-seeded alfalfa. Small size makes PLH an easily overlooked, but costly, pest. Top pest management priority should go to spring-seeded stands. The recommended 70 to 90 day growth period before first harvest

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Alfalfa Weevil Season Running Behind 2017 Pace

Degreeday (dd) accumulations provide the best way to estimate progress of the alfalfa weevil season.  Totals from January 1 through March 31 for 2017 and 2018 can be seen in the table below. The relatively cooler winter and spring for

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Alfalfa Weevils Are Hardy

The recent snow and cold should have little effect on developing alfalfa weevil populations. Temperatures must drop below minus 7o to minus 10o F to be lethal to eggs deposited in plant stems. Small larvae are killed by temperatures of

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Be Ready for the Alfalfa Weevil!

Alfalfa weevil is the key pest of the first cutting. Populations have been above normal over much of the state during the past 2 years, so it is important to be watchful this spring. High populations may last for 2

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Sugarcane Aphid Detected on Sweet Sorghum

This past week, sugarcane aphid was detected and confirmed infesting sweet sorghum in Monroe County. The next day, we detected it in Fayette County on sweet sorghum as well. These are the first confirmed detections of 2017 and are a

Posted in Forages, Grains

Alfalfa Weevils – Now What?

The 2017 alfalfa weevil population is winding down, but some are taking their last bites before leaving fields. The few late-developing larvae, along with newly emerged adults, can feed on stems, crowns, and shoots produced after harvest. Surviving larvae may

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Alfalfa Weevil – The Next Step

Alfalfa weevils have been very damaging in some fields this year (Figure 1). While Individual larvae feed for about 3 weeks, a wide window for egg hatch this year has resulted in an extended season. Unfortunately, additional damage is still

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