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This Week on N Field: Alfalfa Insects

June 16, 2023
Learn how to spot the different feeding signs of alfalfa weevils and aphids, and why it's important to identify all insects present in an alfalfa field before applying chemical control.

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Poison hemlock
Extremely toxic to both animals and humans, poison hemlock can be found statewide in Nebraska and is most toxic right before the fruits mature. (Photo courtesy Oregon Department of Agriculture)

Pasture and Forage Minute: Low Hay Stocks, Grazing Shifts, Toxic Pasture Plants

June 13, 2023
With the lowest level of hay stocks since 1974, extension educators stress the importance of taking inventory of feed and hay resources, and to begin planning for next year's needs right now. 

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Black grass bug
Whitish spots (stippling) are an indication of black grass bugs feeding, which can be managed by intense spring and fall grazing, hay removal, and foliar insecticides for severe infestations. (Photo courtesy Whitney Cranshaw, Colorado State University)

Pasture and Forage Minute: Irrigating First Cutting Alfalfa, Black Grass Bugs and Short Pastures

June 9, 2023
This week — irrigation strategies for moisture-stressed alfalfa prior to first cutting, controlling black grass bugs in wheatgrass, and techniques for stretching pasture.

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Leafy spurge
An effective strategy for controlling leafy spurge is to pair spring applications that prevent seed production with a fall treatment to control new growth.

Pasture and Forage Minute: Controlling Alfalfa Weevil and Leafy Spurge, First Cutting Alfalfa

June 1, 2023
With first cutting alfalfa to begin soon, extension educators discuss the importance of scouting for alfalfa weevils to mitigate yield losses and strategies for timing harvest, plus control options for leafy spurge.

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Alfalfa field
Spring drought can result in stressed alfalfa from aggressive weed growth, resulting in thinner stands and lower yields. View the options for herbicide control in post-emergent and established alfalfa below.

Pasture and Forage Minute: Alfalfa Weevil, Weed Control and Summer Pasture Turn-out

May 4, 2023
This week — Controlling alfalfa weeds with post-emergent herbicides, scouting for alfalfa weevil, and planning the date and pastures for spring turn-out.

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Irrigated alfalfa
For maximum season production, the first alfalfa cutting typically requires six to seven inches of water — if soil profiles are currently very dry, spring irrigation should be considered.

Pasture and Forage Minute: Early Season Alfalfa Irrigation, Trigger Dates and Weed Control

April 19, 2023
This week — Strategies for irrigating alfalfa in early season dry soil conditions, grazing to control abundant weed growth due to drought and forming a drought plan.

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Alfalfa field
Early spring is a good time to evaluate alfalfa stands to assess reseeding needs, and begin control measures on winter annual weeds like pennycress, downy brome and cheatgrass to get the best quality out of your first cutting of alfalfa.

Pasture and Forage Minute: Alfalfa Weed and Stand Management, Grazing Winter Annuals

April 10, 2023
This week — Tips on controlling winter annual weeds for optimum first cutting hay quality, evaluating alfalfa stands with a hay square, and grazing rye, winter wheat and triticale during a cool start to spring.

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Grasshopper
Though central and western Nebraska a have a higher risk for grasshopper outbreaks this season, a cool, wet spring would mitigate population growth not only for this growing season, but also the following year.

Pasture and Forage Minute: Alfalfa Seed Selection, Grasshoppers After Drought

April 5, 2023
This week — Reviewing seed selection to avoid anthracnose and Phytophthora root rot, assessing alfalfa stands and predictions on grasshopper populations following the 2022 drought.

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