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G83-681 Velvetleaf, Fred Roeth, Russell Moomaw, Alex Martin, Orvin Burnside

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide provides guidelines on how to control velvetleaf by prevention, cultural and mechanical methods, and by use of recommended herbicides.

Velvetleaf (Abutilon theophrasti Medic.), a member of the Mallow family, is related to cotton, hollyhocks, and numerous weeds. Other common names include buttonweed, Indian mallow, butterprint, piemarker, velvetweed, and cottonweed. The preferred name, velvetleaf, amply describes its velvety-textured, hairy-surfaced leaves.

A native of China and presumably introduced into the U.S. from India as a fiber crop, this annual weed is adapted to cropland throughout most of the United States. Over the past 10 years, velvetleaf has increased dramatically …

G83-673 Maturity Dates And Freeze Risks Based On Growing Degree Days, Ralph E. Neild, D. T. Smith

University of Nebraska-Lincoln Extension: Historical Materials

Explanation of growing degree days (GDD) necessary for crop maturity and tables showing estimated maturity dates and freeze risks for different GDD accumulations for different planting times in regions of Nebraska.

The concept of growing degree days (GDD) resulted from observations that:

There is a base temperature below which plants do not grow.

The rate of growth increases with temperature above this base.

Crop hybrids require different GDD accumulations to reach maturity.