Glandless acala cotton: More susceptible to insects
AuthorsJohn H. Benedict
Thomas F. Leigh
Angus H. Hyer
Authors AffiliationsJohn H. Benedict is former Post Graduate Research Entomologist, Department of Entomology, University of California, Davis (now Assistant Professor, Department of Entomology, Texas A&M University, Corpus Christi); Thomas F. Leigh is Entomologist, Department of Entomology, University of California, Davis; Ward Tingey is Assistant Professor, Department of Entomology, Cornell University, Ithaca, New York; Angus H. Hyer is Research Agronomist, USDA Cotton Research Station, Shafter.
Hilgardia 31(4):14-15. DOI:10.3733/ca.v031n04p14. April 1977.
Commercially grown Acala cottons (Gossypium hirsutum L.), like most other species of the genus Gossypium, have evolved an effective chemical resistance that deters most plant-feeding animals. The biologically toxic component is a group of related, secondary plant metabolites known as terpenoids. Gossypol, the best known of these terpenoids, is a polyphenolic yellow pigment closely associated with the epidermal glands present on all aerial plant parts as well as in the cottonseed. Most commercial cottonseed contains about 1 percent gossypol, depending on variety and environmental conditions. Expensive chemical and physical procedures are used to remove gossypol from cottonseed products destined for use as food for non-ruminant animals.
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