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The text of Provost Green\u27s remarks are available for viewing below and may be downloaded above. A photograph of Dr. Green is also linked here.https://digitalcommons.iwu.edu/jensen_inauguration/1002/thumbnail.jp

An Integrated Approach to Weed Control in Alfalfa Production Systems

The importance of weed control in forage production should not be overlooked, especially when you consider the high investment associated with alfalfa and other legume forages. Weeds reduce forage yield by competing for water, sunlight, and nutrients. For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. In addition to yield losses, weeds can also lower forage quality, increase the incidence of disease and insect problems, cause premature stand loss, and create harvesting problems. Some weeds are unpalatable to livestock or, in some cases, may be poisonous

Weed Control in Alfalfa

Since weeds which infest forages are harvested along with the alfalfa crop, total dry matter production does not necessarily increase with good weed control. However, controlling weeds which invade alfalfa improve the forage quality. In addition, maintaining good weed control may also prolong the productive life of the alfalfa stand. If managed properly, established alfalfa stands can effectively prevent many annual and perennial weeds from becoming a major problem. Maintaining proper soil fertility, soil pH, and good soil drainage are some practices which help keep the alfalfa competitive against invading weeds. Other factors which put alfalfa under stress, such as poor soil moisture, damage from insects and disease, and cold temperatures can also cause alfalfa to become less competitive. For weed control practices to be successful, voids left in the field after the weeds have been controlled must be filled by a competitive alfalfa stand