The presence of lysigenous cavities filled with terpenoid aldehydes (generically termed 'gossypol') in most tissues of cultivated cottons and their relatives imparts natural resistance to a variety of insect, fungal, and bacterial pests. Deposition of terpenoid aldehydes in cultivated cotton seed, however, renders cottonseed oils and protein meals toxic to non-ruminant animals, including humans. Seeds of the socalled 'glandless-seeded' Australian Gossypium L. species (Gossypium subgenus Sturtia (R.Br.) Tod.) reportedly lack terpenoid aldehydes, and thus may represent an important genetic resource in the development of cottonseed oils and protein meals free of these toxins. Information supporting this assertion, however, is fragmentary and contradictory. To resolve this, seeds of all known Australian Gossypium species were surveyed chemically and anatomically. Immature lysigenous cavities were present in seeds of all 18 species. Lysigenous cavities of sect. Sturtia and sect. Hibiscoidea Tod. seeds were unpigrnented and invisible to the naked eye, while pigmented, macroscopically visible lysigenous cavities occurred in all the sect. Grandicalyx (Fryxell) Fryxell seeds. HPLC (high performance liquid chromatography) analysis revealed that sect. Sturtia and sect. Hibiscoidea seeds did not contain detectable levels of terpenoid aldehydes, but that sect. Grandicalyx seeds contained gossypol.
The Poisson and the negative binomial series, Taylor’s power law, and Morisita’s Iδ-index were used to interpret the dispersion of field counts of the immature stages of Hypera postica (Gyll.) on alfalfa. The data conformed consistently to an overdispersed distribution. Transformations are offered for stabilizing the variance of field counts.
In 1954 Delucchi erected the genera Enaysma and Epilampsis in an attempt to extend and clarify the generic concepts in the Derostenus Westwood-Chrysocharis Förster complex of the subfamily Entedontinae. As the type of Enaysma he designated Enaysma zwolferi Delucchi. Later in rhe same year (Delucchi 1954a) he revised the entire complex as he understood it in the Palaearctic region giving keys to the genera and species he included. Subsequently (Delucchi 1957) he supplemented his original description of the genus Enaysma and expanded his concept of it, adding Enaysma aenea Delucchi, Enaysma parva Delucchi, 1956, and two new species with a revised key to all the Palaearctic species then included by him in the genus. Recently Graham (1959) published a key to the British species in which he erected the new subgenus Pentenaysma, selecting as its type Eulophus latreillii Curtis.
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