Publication Date
1993
Description
Cultivated area of bermudagrass (Cynodon dactylon L. Pers.), in the USA are under stress from a complex of insect and secondary fungal pests which has resulted in a loss in crop production. The fall armyworm (Spodoptera frugiperda (J.E. Smith)) is the major insect herbivore of bermudagrass in the south-eastern USA. Bermudagrass breeding programmes over the last decade have yielded germplasm with potential insect-resistant traits. Thus, a programme was initiated to define bermudagrass allelochemislry with respect to insect herbivory. Pall armyworm is variably responsive to bermudagrass cultivars, the basis being causally related to a differential concentration of the phagostimulant 6, I 0, 14 trimethylpentndecnn-2-onc. The nutritional suitability of bermudagrass to herbivory was cultivar-dependent and associated with a variable profile of several key essential dietary lipid components. These included polyunsaturated falty acid esters, vitamin E, and the sterols: campesterol, stigmasterol, and sitosterol. A differential accumulation of an active feeding deterrent was also found to vary among cultivars.
Citation
Quisenberry, S and Mohamed, M, "Bermudagrass Allelochemistry and Influence on Spodoptera frugiperda Herbivory" (2024). IGC Proceedings (1993-2023). 5.
https://uknowledge.uky.edu/igc/1993/session32/5
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Bermudagrass Allelochemistry and Influence on Spodoptera frugiperda Herbivory
Cultivated area of bermudagrass (Cynodon dactylon L. Pers.), in the USA are under stress from a complex of insect and secondary fungal pests which has resulted in a loss in crop production. The fall armyworm (Spodoptera frugiperda (J.E. Smith)) is the major insect herbivore of bermudagrass in the south-eastern USA. Bermudagrass breeding programmes over the last decade have yielded germplasm with potential insect-resistant traits. Thus, a programme was initiated to define bermudagrass allelochemislry with respect to insect herbivory. Pall armyworm is variably responsive to bermudagrass cultivars, the basis being causally related to a differential concentration of the phagostimulant 6, I 0, 14 trimethylpentndecnn-2-onc. The nutritional suitability of bermudagrass to herbivory was cultivar-dependent and associated with a variable profile of several key essential dietary lipid components. These included polyunsaturated falty acid esters, vitamin E, and the sterols: campesterol, stigmasterol, and sitosterol. A differential accumulation of an active feeding deterrent was also found to vary among cultivars.
