PLANT-PARASITIC NEMATODES IN LOUISIANA SUGARCANE AND PLANT GROWTH RESPONSE TO NEMATICIDE APPLICATION
DOI:
https://doi.org/10.63965/PZUX7155Abstract
Plant-parasitic nematodes (PPN) have not been studied in Louisiana sugarcane for more than 20 years and may threaten this crop. A survey was conducted across 62 sugarcane fields in Louisiana to determine PPN present in fields and their relationship to soil texture and crop stage. Greenhouse studies were conducted using soil from multiple fields with PPN infestation. This study aimed to determine the impact of PPN on sugarcane growth and evaluate nematicides as a management strategy. Collected field soil was subjected to four treatments: (1) no treatment, (2) steam-sterilization, (3) ethoprop, and (4) fluensulfone. After 3 months, PPN population densities were quantified. Tillering and root weight were also measured. The survey revealed that Tylenchorhynchus, Mesocriconema, Pratylenchus, and Helicotylenchus are the predominant PPN genera in Louisiana sugarcane fields. Greenhouse trials showed sterilized soil enhanced sugarcane growth, suggesting PPN have a negative impact on sugarcane production. Ethoprop reduced the main PPN in sugarcane but also reduced plant growth. Fluensulfone potentially reduced Pratylenchus spp. in soil and improved plant growth. Findings suggest PPN influence sugarcane growth in Louisiana, and nematicides show potential for management.
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