. The diseases of the sweet pea ... Sweet peas. 73 that the percent of infection differs with the variety. This means then that in each variety there are certain individual plants which are resistant to this particular fungus tested. Attempts were made to reinfect those plants which remained healthy after the first inocu- lation and it was found that nearly 50% in each case was infected and the rest remained resistant and continued to grow well. This con- clusively shows that while no one variety is entirely immune to a dis- ease yet there are nevertheless certain individuals of that variety w
. The diseases of the sweet pea ... Sweet peas. 73 that the percent of infection differs with the variety. This means then that in each variety there are certain individual plants which are resistant to this particular fungus tested. Attempts were made to reinfect those plants which remained healthy after the first inocu- lation and it was found that nearly 50% in each case was infected and the rest remained resistant and continued to grow well. This con- clusively shows that while no one variety is entirely immune to a dis- ease yet there are nevertheless certain individuals of that variety which have developed the power of resistance. It is well known that if a plant is resistant to a particular disease, it may be very susceptible to another disease. The problem, therefore, is to test the desired va- TABLE VI Name of variety (seed- lings six weeks old) King Edward VII Gray Friar Aurora Apple Blossom Emery Henderson Henry Eckfort Jeannie Gordon Dorothy Eckfort Hellen Pierce Coccineae Katherine Tracy George Herbert Black Knight Jeanett Scott Dobbie Mid Blue Blanche Burpee America Blanche Ferry Mrs. A. Watkins Countess Spencer Black Michael Bolton's pink Countess Cadogan Mrs. Bieberstedt Agnes Eckfort Burpees Dainty E. J. Castle Glady 's Union Captain of the Blues Duke of Westminster Mrs. Collier Burpees Midnight. 100% 92% 70% 70% 60% 80% 72% 40% 90% 100% 100% 100% 90% 60% 100% 20% 100% 100% 1% 4% 60% 80% 70% 40% rieties with all the known diseases to which they are subject. In these •tests all the immune individuals must be selected and by crossing and. 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 Taubenhaus, Jacob Joseph, 1886- [from old catalog]. Philadelphia
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsweetpeas, bookyear19
