Boll weevil Anthonomus grandis Boh. oviposition is decreased in cotton Gossypium hirsutum L. lines lower in anther monosaccharides and gossypol.

1995 ◽  
Vol 43 (10) ◽  
pp. 2735-2739
Author(s):  
Paul A. Hedin ◽  
Jack C. McCarty
Keyword(s):  
Gossypium Hirsutum ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Gossypium Hirsutum L

scholarly journals Comportamento de progênies oriundas de raças primitivas de algodão herbáceo frente ao ataque do bicudo

1999 ◽  
Vol 34 (12) ◽  
pp. 2235-2240 ◽  
Author(s):  
Francisco José Correia Farias ◽  
Maurice James Lukefahr ◽  
Joaquim Nunes da Costa ◽  
Elêusio Curvelo Freire
Keyword(s):  
Gossypium Hirsutum ◽  
Anthonomus Grandis ◽  
Gossypium Hirsutum L

Com o objetivo de obter linhagens resistentes ao bicudo-do-algodoeiro (Anthonomus grandis Boheman), a Embrapa-Centro Nacional de Pesquisa de Algodão vem testando progênies oriundas de raças primitivas de algodoeiro herbáceo (Gossypium hirsutum L.) originárias do México e da América Central, que apresentam níveis aceitáveis de resistência ao bicudo. Em 1991 e 1992, as progênies em BC1F5 e BC1F6 oriundas das linhagens Texas 277, Texas 326 e Texas 1180, Texas 297, Texas 339, Texas 766 e Texas 1134, foram avaliadas com relação à resistência ao bicudo. O delineamento experimental utilizado foi o de blocos ao acaso, com seis repetições. A unidade experimental foi constituída por duas fileiras de 5 m, sob um espaçamento de 0,75 m x 0,20 m. As parcelas foram infestadas com adultos do bicudo recém-emergidos, a uma taxa de 10.000 adultos/ha. Aos seis dias após a liberação dos adultos, as parcelas foram pulverizadas com Cipermethrim, sendo realizadas em intervalos semanais. Foram procedidas cinco avaliações através da coleta de 33 botões florais ao acaso, por parcela. Os maiores níveis de resistência ao bicudo foram obtidos pelas progênies Texas 326-95-1, Texas 277-87-5, Texas 1180-99-2, Texas 297 e Texas 339, com redução de ataque de 44,0, 41,2, 32,0, 40,4 e 36,4%, respectivamente, em relação à testemunha CNPA 6H.

scholarly journals Determinación de atributos en genotipos de algodón (Gossypium hirsutum L.) en la rotación maíz-soya asociados a suelos ácidos mejorados de la altillanura colombiana

2016 ◽  
Vol 16 (2) ◽  
pp. 251
Author(s):  
Luis Fernando Campuzano Duque ◽  
Samuel Caicedo Guerrero ◽  
Judith Guevara Agudelo
Keyword(s):  
Gossypium Hirsutum ◽  
Anthonomus Grandis ◽  
Font Size ◽  
Gossypium Hirsutum L ◽  
Para Determinar

<p><span style="font-size: medium;">En Colombia, en los últimos 15 años, se ha desarrollado un proceso de investigación para la ampliación de la frontera agrícola focalizado en la altillanura plana, con énfasis en la construcción de capa arable asociado a la saturación de bases, mediante el encalamiento, la labranza vertical y la rotación arroz, maíz y soya, con la posibilidad de otras especies como el algodón que podrían ingresar al modelo. Para ello, se realizó una investigación pionera en Colombia para determinar la adaptación del algodón en las condiciones de las sabanas ácidas mejoradas de la altillanura. Se desarrolló una prueba de evaluación agronómica con cinco genotipos élites de algodón en un diseño de bloques completos al azar en cuatro localidades en suelos con una saturación de bases superior al 80 %. Los resultados permitieron identificar un genotipo (LC-156), que presentó una adaptación a la altillanura, asociado a un rendimiento promedio de 2,2 t/ha de algodón semilla, 1,5 t/ha de algodón tipo fibra media a larga y un porcentaje de extracción de fibra superior al 36,0 %. La ventaja comparativa de esta región para una producción sostenible de algodón está dado por el rendimiento de algodón fibra superior al promedio nacional, reducción del 33,2 % en los costos de producción, calidad de fibra media larga con destino para la exportación y la ausencia del insecto plaga de mayor importancia económica en Colombia, el picudo (Anthonomus grandis Boheman).</span></p>

Dry bolls and their association with Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae) survival through cotton fallow periods

2021 ◽  
pp. 1-12
Author(s):  
Willian S. do Vale ◽  
Maria A. Castellani ◽  
Victor R. de Novais ◽  
Welliny S.R. Dias ◽  
Ana Carolina S. Lima ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Survival Strategy ◽  
Cotton Crop ◽  
Fallow Period ◽  
Reproductive Structures ◽  
Internal Structures

Abstract The boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), can remain inside dry and deformed reproductive structures of cotton, Gossypium hirsutum Linnaeus (Malvaceae), known as dry bolls, during the cotton fallow to infest the next cotton crop. In this study, the influence of cotton cultivars and sowing densities on the formation of dry bolls was evaluated. In addition, dry bolls were dissected and internal structures that were related to boll weevil development were estimated. Finally, the presence and survival of boll weevils inside dry bolls were evaluated. The results indicate that the number of dry bolls, empty pupal cells, and emergence holes was influenced by cultivar and not by sowing density. Almost one-quarter (22.53%) of adult boll weevils examined was found alive inside the dry bolls after 10 weeks, which is slightly longer than the duration of cotton fallow in Brazil’s main cotton-producing regions. Therefore, remaining inside the dry bolls is an important survival strategy for boll weevils during the cotton fallow period, and cotton cultivars with a greater propensity for the formation of dry bolls might favour survival of the pest during this period.

scholarly journals Plantas alimenticias alternativas del picudo del algodonero (Anthonomus grandis Boh.) (Coleoptera: Curculionidae) en la provincia de Formosa, Argentina: análisis palinológico del tracto digestivo

2000 ◽  
Vol 29 (2) ◽  
pp. 245-255 ◽  
Author(s):  
Graciela A. Cuadrado ◽  
Silvina S. Garralla
Keyword(s):  
Gossypium Hirsutum ◽  
Anthonomus Grandis ◽  
Gossypium Hirsutum L ◽  
Buena Vista

En el presente trabajo se analiza el contenido del tracto digestivo de picudos capturados en cuatro localidades de la provincia de Formosa, Argentina: Laguna Blanca, Palma Sola, Laguna Naik Neek y Buena Vista durante el período junio 1995 - mayo 1997. De los 647 picudos disecados, el 70 % presentó polen en el tracto digestivo. Se registraron 2.404 granos de polen que fueron agrupados en 37 tipos polínicos pertenecientes principalmente a las familias Malvaceae, Compositae, Solanaceae y en porcentajes inferiores al 1%: Euphorbiaceae, Amaranthaceae, Leguminosae y Polygonaceae. A lo largo del período estudiado, la ingesta de granos de polen fue muy variable, aunque pudo observarse una tendencia a una menor ingesta durante los meses de invierno. Las posibilidades de alimentación, unidas a las condiciones climáticas y la presencia de Gossypium hirsutum L., su más importante hospedante reproductiva, y Cienfuegosia drumondii (Gray) reconocida como hospedante reproductiva silvestre, favorecen la actividad del picudo durante todo el año.

Diel Patterns of Pheromone Production in the Boll Weevil (Coleoptera: Curculionidae)

2007 ◽  
Vol 42 (2) ◽  
pp. 250-260
Author(s):  
D. W. Spurgeon ◽  
C. P.-C. Suh
Keyword(s):  
Boll Weevil ◽  
Detailed Knowledge ◽  
Anthonomus Grandis ◽  
Pheromone Production ◽  
Diel Pattern ◽  
Gossypium Hirsutum L ◽  
Diel Patterns ◽  
Pheromone Trapping ◽  
Pheromone Composition ◽  
Trapping Methods

Detailed knowledge of boll weevil, Anthonomus grandis Boheman, chemical ecology on cotton, Gossypium hirsutum L., is needed to improve pheromone trapping methods. Recent studies using headspace collections have indicated that most pheromone is not in the feces as previously assumed. We used headspace collections to examine the diel patterns of boll weevil pheromone production and to determine whether the timing of food replacement influenced those patterns. Pheromone production of individual 9- and 11-d-old weevils was estimated during 4 daily periods (0730–1130, 1130–1530, 1530–1930, and 1930–0730 h) under temperatures of 27 ± 2°C and with a 13:11 (L:D) h photoperiod that began at 0700 h. Weevils fed daily at 0730 h produced more pheromone (2.83 ± 0.25 μg h−1) than weevils fed at 1530 h (1.95 ± 0.25 μg h−1), and 11-d-old weevils produced more pheromone (2.62 ± 0.22 μg h−1) than 9-d-old weevils (2.16 ± 0.23 μg h−1). Furthermore, weevils fed at 0730 h exhibited a clear diel pattern of pheromone production with maximal and minimal production occurring between 1130–1530 h and 1930–0730 h, respectively. Weevils fed at 1530 h exhibited a similar periodicity, but the pattern was less distinct. Pheromone composition of weevils fed at 0730 h was relatively consistent among daily periods and the ratio of the 4 components was approximately 45:42:3:10 (I:II:III:IV). However, pheromone composition varied significantly among daily periods for weevils fed at 1530 h. Our results demonstrate a diel periodicity in pheromone production by the boll weevil, and illustrate the need for careful control of weevil diets in such studies.

THE INTERACTION OF COTTON AND BOLL WEEVIL (COLEOPTERA: CURCULIONIDAE) — A STUDY OF CO-ADAPTATION

1979 ◽  
Vol 111 (3) ◽  
pp. 357-366 ◽  
Author(s):  
A. P. Gutierrez ◽  
Y. Wang ◽  
R. Daxl
Keyword(s):  
Population Dynamics ◽  
Gossypium Hirsutum ◽  
Production Rate ◽  
Growth Parameters ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Weather Patterns

AbstractThe growth parameters for cotton (Gossypium hirsutum L.) were examined via optimization studies to determine if the observed values were optimal for the season lengths and weather patterns found in California and Nicaragua. The parameters observed for Nicaraguan cotton were further examined to determine if predation by boll weevil (Anthonomus grandis Boh.) of small cotton fruit (squares) could explain the observed discrepancies. All of the observed growth parameters except the fruit bud production rate for the Acala SJ II variety of cotton which is grown in California appeared to be reasonably optimal for California condition (i.e. boll weevil does not occur in California). By contrast, the parameters for the Nicaraguan variety were sub-optimal if boll weevil was excluded from the analysis, but near optimal if the population dynamics of pest were included.

Pheromone Production by the Boll Weevil (Coleoptera: Curculionidae) Fed Cotton Squares and Bolls

2009 ◽  
Vol 44 (3) ◽  
pp. 209-221 ◽  
Author(s):  
D. W. Spurgeon ◽  
C. P.-C. Suh
Keyword(s):  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Pheromone Traps ◽  
Pheromone Production ◽  
Adequate Explanation ◽  
Flower Buds ◽  
Gossypium Hirsutum L ◽  
Pheromone Emission ◽  
Small Fruit ◽  
Pheromone Composition

The boll weevil, Anthonomus grandis Boheman, produces pheromone on a variety of diets, but access to flower buds (squares) or small fruit (bolls) of cotton, Gossypium hirsutum L., is thought necessary for high levels of pheromone production. However, estimates of the pheromone emitted by weevils fed bolls are not available. We used headspace collections to determine (1) whether male weevils already emitting pheromone could sustain production on bolls, and (2) whether pheromone emission could be initiated on a boll diet. Male weevils switched to a diet of small (12 - 15 mm diam) or medium (20 - 23 mm diam) sized bolls after feeding on squares (5 - 7 mm diam) for 7 d maintained pheromone releases at levels ≥ that of weevils remaining on squares through the 13th day of adulthood. Pheromone composition did not vary substantially among the diets. When the diets were provided beginning at adult eclosion, weevils initiated pheromone emission similarly on all diets, but weevils fed small bolls released the most pheromone by day 9 of adulthood. No difference in pheromone composition was observed among the diet treatments. In addition, weevils that entered diapause by the end of the experiments produced only small amounts of pheromone. The high levels of pheromone production by weevils fed bolls may be ecologically important in ensuring that potential overwintering females are mated before emigrating from maturing cotton. Our findings also suggest that diminished competition between naturally-produced pheromone and traps is not an adequate explanation for commonly observed increases in late-season captures by pheromone traps.

scholarly journals Transcriptome analysis of Gossypium hirsutum flower buds infested by cotton boll weevil (Anthonomus grandis) larvae

BMC Genomics ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 854 ◽  
Author(s):  
Sinara Artico ◽  
Marcelo Ribeiro-Alves ◽  
Osmundo Oliveira-Neto ◽  
Leonardo Lima de Macedo ◽  
Sylvia Silveira ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Transcriptome Analysis ◽  
Boll Weevil ◽  
Anthonomus Grandis ◽  
Cotton Boll ◽  
Flower Buds ◽  
Cotton Boll Weevil
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