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Updated: Jun 25, 2026
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Screening Cotton Genotypes for Reniform Nematode Resistance
Published on: May 2, 2019
Rotylenchulus reniformis below Plow Depth Suppresses Cotton Yield and Root Growth
Journal of Nematology
|March 6, 2009
Summary
Deep soil fumigation effectively controls reniform nematodes (Rotylenchulus reniformis) in cotton fields. Manual placement of fumigant below plow depth significantly boosts cotton yield and reduces nematode populations more effectively than conventional methods.
Area of Science:
- Agricultural Science
- Nematology
- Soil Science
Background:
- Reniform nematode (Rotylenchulus reniformis) causes significant damage to cotton crops, particularly below plow depth.
- Traditional fumigation methods may not effectively control nematodes in deeper soil layers.
Purpose of the Study:
- To evaluate the efficacy of deep soil fumigation for controlling R. reniformis in cotton.
- To compare deep manual fumigant placement with conventional chisel fumigation.
Main Methods:
- Deep holes (91 cm) were dug, and 1,3-dichloropropene was manually placed at various depths (30, 61, 91 cm).
- Chisel fumigation was applied at 43 cm depth.
- Nematode density, root length density, and cotton lint yield were measured.
Main Results:
- Manual fumigant placement at 91 cm reduced R. reniformis by up to 96% and increased yield by 92%.
- Chisel fumigation reduced nematodes only in the top 61 cm and increased yield by 88%.
- Deep fumigation at 81 cm or both 43 and 81 cm depths significantly reduced nematodes and increased cotton yield.
Conclusions:
- Deep soil fumigation, especially manual placement below plow depth, is highly effective against R. reniformis.
- This method offers superior nematode control and yield enhancement compared to shallower, conventional fumigation techniques.
