Improving Procedures Used to Select for Lygus Bug Resistance in Alfalfa
نویسندگان
چکیده
Since the 1960’s, attempts have been made to reduce alfalfa flower damage from Lygus bug feeding by developing resistant alfalfa varieties. Much of this work was conducted at New Mexico State University by Dr. B. A. Melton and his graduate students (Vering 1968, Knipe 1969, Arledge 1972, Auld 1973). In order to identify plants that could withstand damage from Lygus. bug feeding these workers developed techniques for testing flower buds in the field and seedlings in a lath house. Unfortunately, after one or two cycles of selection, evaluations of germplasm developed by these methods showed that progress had been limited. No germplasm releases or new cultivars resulted from this breeding program, but seed stocks remain from several germplasm selections. Dr. M. Nielson with the USDA at Tucson used a modified lath house technique to screen a number of alfalfa varieties, which he rated for their potential resistance to Lygus (Nielson 1974).
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