Sunburn and aphid injury of soybeans and cowpeas

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dc.contributor.author Gibson, Frederick
dc.date.accessioned 2017-06-01T16:41:40Z
dc.date.available 2017-06-01T16:41:40Z
dc.identifier.uri http://hdl.handle.net/2097/35624
dc.description In a country where the soil is naturally deficient in organic matter, the problem of green manuring is important. For the purpose of supplying this need, and also as cover and forage crops, cowpeas (Vigna sincnsis) and soybeans (Soja max) have been introduced into Arizona. Since the value of these plants for green manure, cover, and forage crops depends chiefly on the production of abundant foliage, any condition which favors injury to the green parts must be taken into account in the selection of varieties, and therefore susceptibility to sunburn and to parasitic diseases, which may result in the destruction of a large part of the leaf surface, are factors which must be considered. During the fall of 1920, the attention of the writer was directed to a spotting of the leaves of cowpeas and soybeans growing on the Salt River Valley Farm near Mesa, Arizona. Indications of sunburn as well as the presence of aphicls and a dense fungal growth, in spots, led to the cultural and histological studies that are described in this paper. It is hoped that the results may prove helpful in the selection of varieties of cowpeas and soybeans suited to the semi-arid conditions that prevail in Arizona and other southwestern states. In pursuing the investigation, field studies were supplemented with laboratory work and with inoculations of plants grown in the greenhouse at the University of Arizona at Tucson.
dc.description Originating text in English.
dc.description Citation: Gibson, Frederick. (1922). Sunburn and aphid injury of soybeans and cowpeas. Bulletin / University of Arizona, Agricultural Experiment Station, 2, 39-46.
dc.language.iso eng
dc.relation.uri http://hdl.handle.net/10150/190594
dc.rights Copyright for this item remains with the original copyright holder. This work has been made available under Section 107 of U.S. copyright law following a fair use evaluation.
dc.rights.uri http://rightsstatements.org/vocab/InC/1.0/
dc.subject Cowpea
dc.subject Diseases and pests
dc.subject Soybean
dc.subject Wounds and injuries
dc.title Sunburn and aphid injury of soybeans and cowpeas
dc.type Text
dc.date.published 1923
dc.citation.epage 46
dc.citation.spage 39
dc.citation.volume 2


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Copyright for this item remains with the original copyright holder. This work has been made available under Section 107 of U.S. copyright law following a fair use evaluation. Except where otherwise noted, the use of this item is bound by the following: Copyright for this item remains with the original copyright holder. This work has been made available under Section 107 of U.S. copyright law following a fair use evaluation.

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