|
1997 Sunflower Grower Survey of Pest Problems and Pesticide Use |
Table 28. Worst weed problem in 1997.
| Weed | Kansas | Minnesota |
North Dakota | South Dakota |
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| Worst Weed | One of Three Worst Weeds | Worst Weed | One of Three Worst Weeds | Worst Weed | One of Three Worst Weeds | Worst Weed | One of Three Worst Weeds | ||||
-- % of respondents' acres -- |
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| Canada Thistle | 2.1 | 5.3 | 18.7 | 38.5 | 19.0 | 49.8 | 8.7 | 46.9 | |||
| Common Cocklebur | 1.9 | 6.5 | 0.0 | 0.4 | 8.9 | 22.8 | 4.4 | 15.5 | |||
| Com. Lambsquarters | 0.0 | 2.2 | 0.4 | 14.3 | 0.5 | 5.4 | 0.7 | 2.3 | |||
| Foxtail (Pigeongrass) | 3.3 | 35.3 | 34.5 | 58.9 | 28.8 | 53.6 | 58.0 | 68.8 | |||
| Kochia | 17.5 | 64.3 | 1.2 | 2.8 | 5.5 | 28.2 | 6.5 | 44.8 | |||
| Large Crab Grass | 4.1 | 11.1 | 0.0 | 0.0 | 0.6 | 0.6 | 0.0 | 0.7 | |||
| Nightshade | 0.0 | 0.0 | 0.0 | 0.0 | 1.9 | 5.6 | 0.9 | 7.0 | |||
| Quackgrass | 0.2 | 1.4 | 0.8 | 28.9 | 2.9 | 18.1 | 1.7 | 3.7 | |||
| Pigweed species | 26.1 | 47.0 | 0.9 | 6.8 | 3.3 | 10.9 | 3.7 | 23.0 | |||
| Russian thistle | 24.4 | 38.2 | 0.0 | 1.1 | 2.6 | 7.1 | 0.0 | 1.2 | |||
| Volunteer cereals | 2.3 | 3.2 | 0.0 | 2.2 | 0.0 | 1.8 | 0.2 | 4.6 | |||
| Wild buckwheat | 0.0 | 0.1 | 0.7 | 9.6 | 0.7 | 3.0 | 2.0 | 8.4 | |||
| Wild mustard | 0.0 | 0.0 | 17.6 | 51.0 | 19.1 | 50.5 | 0.0 | 6.3 | |||
| Wild oat | 0.0 | 0.0 | 7.3 | 26.9 | 1.6 | 9.1 | 1.3 | 5.8 | |||
| None | 6.8 | 6.8 | 2.8 | 2.8 | 0.5 | 0.5 | 4.3 | 4.3 | |||
| Other | 10.1 | 30.5 | 6.0 | 8.7 | 1.6 | 6.0 | 5.4 | 10.0 | |||