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Crop Protection: Seedling Diseases and Nematodes

T.A. Wheeler


 
ABSTRACT

Seedling diseases which result in poor emergence, post-emergence damping-off and damaged roots are found in every state where cotton is grown. Some of these fungi cause more disease under wet conditions, others cause more disease under cool temperatures. These diseases are managed by altering the soil environment, seed and in-furrow fungicides, and variety tolerance. Cost-effective management can be obtained by rating fields for: seedling disease history; soil temperatue near planting time; rainfall forcast for the week after planting; tillage practices; crop rotation; and nematodes. Use of the best combination of management practices should be based on potential for seedling disease. Nematode problems are more consistent year to year than seedling disease, because damage is primarily related to the density of the nematode at planting. Management includes resistant cultivars, crop rotation, and use of nematicides. Management options should be chosen based on sampling soil for nematode species and density.



Reprinted from Proceedings of the 1997 Beltwide Cotton Conferences pp. 12 - 13
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998