. Challenges in forage and range research. Forage plants; Rangelands. In this test at Reno, New, the stem nematode Ditylenchus dipsaci damaged the susceptible alfalfa variety Ranger. Lahonton had been bred for resistance. To develop resistant varieties we need new or addi- tional research on— • Nature and extent of losses from specific diseases, insects, and nematodes. • Pathogenicity and life cycle of disease organisms. • Identification of races within pathogens. • Techniques for culturing pathogenic organisms. • Transmission of diseases and effective artificial inoculation procedures. • Deve
. Challenges in forage and range research. Forage plants; Rangelands. In this test at Reno, New, the stem nematode Ditylenchus dipsaci damaged the susceptible alfalfa variety Ranger. Lahonton had been bred for resistance. To develop resistant varieties we need new or addi- tional research on— • Nature and extent of losses from specific diseases, insects, and nematodes. • Pathogenicity and life cycle of disease organisms. • Identification of races within pathogens. • Techniques for culturing pathogenic organisms. • Transmission of diseases and effective artificial inoculation procedures. • Development of rapid and reliable techniques for isolating resistant stocks, or for devising other disease-control measures. • Response of plants to various combinations of dis- seases, insects, and nematodes. • Mechanism of resistance to diseases, insects, and nematodes. • Inheritance of resistance. • Development of lines with multiple resistance to diseases, insects, and nematodes. Research on Tolerance or Resistance to Environmental Hazards Environmental hazards cause seeding failure and slow growth of grasses and legumes, and loss of mature plantings. Environmental hazards also increase losses. Factors influencing plant survival arc studied in the laboratory, the greenhouse, and the field. In this field experiment at Clemson, , the lifespan of individual!) marked while clover stolons is recorded. 11. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Agricultural Research Service. Forage and Range Research Branch. Washington, D. C. : Agricultural Research Service, U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, booksubjectforageplants, booksubjectrangelands
