Seeding into Winter Rye

Alfalfa, peas, and oats were planted mid-July into winter rye following winter rye forage harvest on July 3. Winter rye was headed and green. Alfalfa, peas, and oats are not growing in areas where winter rye was widrowed. Field has streaked pattern. Liquid manure and tillage occured after winter rye was harvested prior to […]

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Frosted Alfalfa

Probably time to intitiate a little discussion on frosted crops. In East Central WI the tips on many plants have been frosted, but lower shoots still seem in pretty good shape (photo 1). A walk around the alfalfa variety trial yielded an interesting comparison between dormancy rating (I presume, but didn’t have a plot map). […]

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Stunted Alfalfa

Several alfalfa fields have sizeable areas of severely stunted alfalfa on this growers farms. The alfalfa was seeded in Spring 2000 following corn. Last fall and thru this seasons first cutting, the stand was uniform. Potato leafhopper control was applied in July above threshold. The stunted areas are severe and primarily on the high spots […]

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Root rot in oat/pea mixtures

My assumption is that this is PRR in peas. Oat and pea mixtures are affected. Healthy plants from higher ground are a good 12-15″ taller than stunted, yellowed plants in lower, wetter areas. I assume these are Trapper field peas. Roots are rotted close to soil surface; mushy and stunted below ground. If you are […]

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Aphanomyces suspect

Aphanomyces suspected. Dekalb 120. Direct seeding. Corn last 3 years with 3.2 ounces/acre of Hornet and 2 ounces/ acre Banvel applied May 25, 2000. Hornet has a 10.5 month planting interval for alfalfa so this probably is not a concern. Yellow cotyledons. Stunted plants are at least 3 inches shorter than healthy plants. Stunted seedlings […]

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Effect of mid-September harvest on alfalfa

This field had excellent stem counts during the fall of 2000. Unfortunately, a mid-September 2000 harvest was taken. Add in the cold, wet spring of 2001, and you have ideal conditions for crown rot as shown here. Some years back research was conducted documenting the amount of yield taken with a 4th cutting in September […]

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Alfalfa blotch leafminer

Although almost non-existent since 1997, I was in two fields this morning with relatively high levels of alfalfa blotch leafminer feeding. A high percentage of leaflets had pinholes (photo 1) and many had the large white “comma” from larval feeding (photo 2). Perhaps a situation to watch in subsequent growth. Active spittlebug signs as well […]

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