Development of an Alfalfa Having Resistance to the Meadow Spittlebug1

Autor:	Curtis M. Wilson, Ralph L. Davis
Rok vydání:	1958
Předmět:	Ecology Agronomy Resistance (ecology) Insect Science Infestation Antibiosis medicine General Medicine Field population Biology medicine.disease_cause
Zdroj:	Journal of Economic Entomology. 51:219-222
ISSN:	1938-291X 0022-0493
DOI:	10.1093/jee/51.2.219
Popis:	Purdue Synthetic F. alfalfa, assigned the number A600 by t he Alfalfa Improvement Conference has been synthesized for evaluating resistance to certain insects as well as for desirable agronomic qualities. Numerous field trials of 2 acres in size show that resistance to the meadow spittlebug found in three of its four parent clones is transmitted to the progeny. A600 is not immune, but has a high amount of resistance not found in any commercially grown alfalfa. This resistance appears to be of three types: antibiosis, tolerance, and possibly unattractiveness or on-preference. It appears to inherit antibiosis from one of its parent clones, C40, which has consistently supported much lower populations than other clones in survival and field population studies. Tolerance is probably the most important resistance factor in A600, since damage from infestation is generally slight. Unattractiveness, or non-preference, is also probably a factor. There has been some evidence of this in selected alfalfa, but it is more difficult to ascertain.
Databáze:	OpenAIRE
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