Interference of Broadleaf Signalgrass (Brachiaria platyphylla) in Peanuts (Arachis hypogaea)

Interference studies utilizing natural infestations of broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash] in peanuts [Arachis hypogaea (L.) ‘Florigiant′] were conducted at two sites in 1978 and repeated at the same sites in 1979. Full-season interference from broadleaf signalgrass populat...

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Bibliographic Details
Published in:Weed science 1982-01, Vol.30 (1), p.45-49
Main Authors: Chamblee, Rick W., Thompson, Lafayette, Coble, Harold D.
Format: Article
Language:English
Subjects:
Crop harvesting
Crops
Forage
Infestation
Peanuts
Planting
Planting seasons
Seed productivity
Soybeans
Weeds
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Summary:Interference studies utilizing natural infestations of broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash] in peanuts [Arachis hypogaea (L.) ‘Florigiant′] were conducted at two sites in 1978 and repeated at the same sites in 1979. Full-season interference from broadleaf signalgrass populations of 8, 16, and 1050 plants/10 m of row reduced seed yields 14, 28, and 69%, respectively. Linear regression analysis showed that slightly less than 4 plants/10 m of row significantly reduced yields. Broadleaf signalgrass interference with peanuts for 6 weeks or less after planting did not reduce seed yields; however, interference for 8 weeks or longer after planting did. Peanuts kept weed-free for 6 weeks or more after planting had seed yields equal to peanuts kept weed-free all season. Full-season broadleaf signalgrass interference reduced mature peanut forage yields 64%, but peanut interference only reduced broadleaf signalgrass forage yield 10%.
ISSN:0043-1745
1550-2759
DOI:10.1017/S004317450002614X