Results 171 to 180 of about 1,616 (205)

Taxonomy of the Subspecies of Anthonomus grandis (Coleoptera: Curculionidae)

Annals of the Entomological Society of America, 1966
In the years since the thurberia weevil, Anthonomus grandis thurberiae Pierce, was described, attempts to separate it from the boll weevil, A. g. grandis Boheman, by using the characters noted by Pierce have met with indifferent success. In an intensive study of specimens clearly representative of the 2 named subspecies of grandis , 3 characters were ...
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Proteolytic processing of the vitellogenin precursor in the boll weevil, Anthonomus grandis

Archives of Insect Biochemistry and Physiology, 1993
AbstractThe soluble proteins of the eggs of the coleopteran insect Anthonomus grandis Boheman, the cotton boll weevil, consist almost entirely of two vitellin types with Mrs of 160,000 and 47,000. We sequenced their N‐terminal ends and one internal cyanogen bromide fragment of the large vitellin and compared these sequences with the deduced amino acid ...
L J, Heilmann, P M, Trewitt, A K, Kumaran   +2 more
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Evaluation of pheromonal production of populations of Anthonomus grandis grandis (Coleoptera:curculionidae) exposed to sub dosagens of organophosphates and pyrethroids.

Sigmae, 2019
Devido ao seu alto poder de destruição o bicudo-do-algodoeiro (Anthonomus grandis grandis (Coleoptera: Curculionidae)) é considerado uma das principais pragas na cotonicultura brasileira. O principal método de controle contra o bicudo é o uso de inseticidas convencionais.
Sharrine Omari Domingues de Oliveira Marra, Antônio Tavares de Souza Neto, Cristina Schetino Bastos, Raul Narciso Carvalho Guedes, Lucia Madalena Vivan, Pedro Henrique Alves Marra, Renata Fernandes   +6 more
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The rôle of the spermathecal gland of the boll weevil, Anthonomus grandis

Journal of Insect Physiology, 1975
Abstract Spermatozoa were relatively inactive and did not enter the spermatheca of female boll weevils, Anthonomus grandis, whose spermathecal glands were removed as teneral adults. However, these females were able to lay fertile eggs for a 2 week period.
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Collection of pheromone from atmosphere surrounding boll weevils,Anthonomus grandis

Journal of Chemical Ecology, 1989
An effluvial method was developed to collect the pheromone, grandlure from actively calling male boll weevils,Anthonomus grandis Boheman. The adsorbant, Porapak Q (ethylvinylbenzene-divinylbenzene), was utilized to trap and concentrate the pheromone.
J F, Chang, J H, Benedict, T L, Payne, B J, Camp, S B, Vinson   +4 more
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Functions of the spermathecal muscle of the boll weevil, Anthonomus grandis

Journal of Insect Physiology, 1975
Abstract In female boll weevils, Anthonomus grandis, spermathecal filling was not affected by severing the spermathecal muscles. Females whose spermathecal muscles were severed 2 to 4 weeks after mating laid infertile eggs and resumed virginal ovipositional behaviour indicating the importance of this muscle in supplying sperm for egg fertilization ...
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Pectinases from boll weevil larvae, Anthonomus grandis

Journal of Insect Physiology, 1972
Abstract Assays were conducted throughout a wide pH range to measure the ability of extracts from third instar boll weevil larvae to degrade pectic substances. Pectin was deesterified and was depolymerized by both hydrolytic and trans -eliminative mechanisms. Sodium polypectate (deesterified pectin, or pectic acid) was depolymerized solely by trans
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Time course of enzyme development in the boll weevil, Anthonomus grandis

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1979
Abstract 1. 1. The specific activities of lactic dehydrogenase, α-hydroxybutyric dehydrogenase, glutamic oxalacetic transaminase, glutamic pyruvic transaminase, and acid phosphatase were monitored in adult male and female boll weevil homogenates for eleven days post emergence. 2. 2.
Yen-Yun H. Chang, James L. Frazier, James R. Heitz   +2 more
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Spermiogenesis in boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae)

International Journal of Insect Morphology and Embryology, 1975
Abstract Spermiogenesis of Anthonomus grandis Boheman, the cotton boll weevil, was studied by transmission electron microscopy. The basic morphologic features investigated and illustrated were: acrosome, nucleus, fibrous masses, microtubules, and mitochondrial derivatives.
George Gassner, Dinah Childress, Donna J. Klemetson   +2 more
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Regulation of vitellogenin synthesis and uptake in the boll weevil, Anthonomus grandis

Physiological Entomology, 1997
Abstract. Hormonal factors influencing reproductive development were examined in adult boll weevils, Anthonomus grandis (Boheman) (Coleoptera: Curculionidae). Long‐day, high‐temperature rearing conditions promote reproduction whereas short‐day, low‐temperature conditions ...
TINA E. TAUB‐MONTEMAyOR, MARy ANN RANKIN   +1 more
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