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Influence of water movement and root growth on the downward dispersion of Rotylenchulus reniformis
- The presence of Rotylenchulus reniformis below the plow layer can have negative effects on cotton production by restricting the uptake of water and nutrients by roots in the lower soil horizons. Two trials were established in 7.62-cm diameter by 75-cm deep soil cores to determine 1) the effect of water movement on vertical translocation of R. reniformis, and 2) the role of root growth in the downward migration of R. reniformis. The water movement study consisted of three treatments of simulated rainfall amounts, 25-mm, 76-mm, and 127-mm, and no rainfall. Water movement minimally affected the movement of R. reniformis through the soil profile. Nematodes were observed to a depth of 30-cm after the 25-mm rain event. Rotylenchulus reniformis was detected to a depth of 45-cm following 76-mm of rainfall and to the maximum sampling depth of 75-cm following 127-mm of rainfall. Cotton roots reached the maximum depth of 75-cm at 60 days after planting (DAP). Vermiform life stages reached 75-cm at 45 DAP. Females colonized roots to a depth of 62-cm at 90 DAP. Cotton roots were observed to exhibit less growth when the numbers of females embedded in the roots was the highest.
Moore, Scott R. , Lawrence, Kathy S. , Arriaga, Francisco J. , Burmester, Charles H. , Van Santen, Edzard
Rotylenchulus reniformis , Zea mays , cotton , crop production , females , host-parasite relationships , migration behavior , nutrient uptake , rain , rainfall simulation , root growth , roots , soil depth , soil horizons , soil profiles , soil water movement , whey products
- Includes references
- Nematropica 2011 June, v. 41, no. 1
Journal Articles, USDA Authors, Peer-Reviewed
- Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.