|
1997 Sunflower Grower Survey of Pest Problems and Pesticide Use |
Table 58. Worst disease problem in 1997.
Disease |
Kansas | Minnesota | North Dakota | South Dakota | ||||||||
| Worst disease | One of three worst diseases | Worst disease | One of three worst diseases | Worst disease | One of three worst diseases | Worst disease | One of three worst diseases | |||||
-- % of respondents' acres -- |
||||||||||||
| Charcoal Rot | 2.6 | 8.5 | 0 | 1.1 | 0 | 2.7 | 1.9 | 2.1 | ||||
| Downy Mildew | 2.3 | 3.5 | 0.7 | 11.6 | 2.3 | 10.8 | 21.8 | 23.3 | ||||
| Phoma Black Stem | 25.5 | 32.5 | 10.0 | 26.2 | 13.6 | 35.9 | 7.4 | 15.9 | ||||
| Phomopsis | 0 | 0.3 | 25.4 | 35.5 | 0.9 | 3.6 | 0 | 6.9 | ||||
| Rizopus Head Rot | 12.8 | 43.6 | 1.3 | 8.3 | ALIGN="RIGHT">0.62.0 | 1.2 | 1.9 | |||||
| Rust | 4.7 | 33.2 | 1.1 | 1.1 | 4.3 | 8.0 | 0.7 | 4.3 | ||||
| Sclerotinia Head Rot | 10.1 | 17.7 | 36.2 | 70.0 | 27.1 | 56.1 | 11.4 | 43.6 | ||||
| Sclerotinia Wilt | 0.2 | 0.2 | 10.5 | 48.5 | 21.8 | 50.4 | 9.3 | 39.9 | ||||
| White Rust | 0 | 0.5 | 0 | 1.0 | 0 | 1.2 | 0.2 | 2.4 | ||||
| None | 28.7 | 28.7 | 4.3 | 4.3 | 21.8 | 21.8 | 33.5 | 33.5 | ||||