Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Natural Enemies and Competitors of Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) in Colombia
Neotropical Entomology , 2002, DOI: 10.1590/S1519-566X2002000400018
Abstract: the objective of this research was to survey and record the natural enemies and competitors of the coffee berry borer (cbb) hypothenemus hampei (ferrari) in the colombian coffee region. despite the recently introduction of cbb to colombia, 25 natural enemies were recorded, including beauveria bassiana. except for this fungus, the other organisms are new records of natural enemies of cbb. this emphasizes the little knowledge about these natural control agents and competitors that can help to keep the cbb population under control. the predators were the group with higher number of natural enemies followed by the competitors, fungi, bacteria and protozoans. only one parasitoid wasp was recorded attacking cbb adults.
Alimentary canal and reproductive tract of Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae, Scolytinae)
Rubio G., José D.;Bustillo P., Alex E.;Vallejo E., Luis F.;Acu?a Z., José R.;Benavides M., Pablo;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000200006
Abstract: the alimentary canal and the reproductive tract of males and females of hypothenemus hampei ferrari are described. the alimentary canal of h. hampei showed the crop with several spine-like structures and the midgut with few gastric caeca. we evidenced for the first time that adult females need to feed on coffee in order to produce viable eggs before and during oviposition period. the presence of air bubbles inside the anterior midgut may be due to starvation rather than the response of the environment during flying as previously reported. two ovaries and the same structures and arrangements common to individuals of the curculionidae beetles composed the female reproductive system. the male reproductive tract showed a significant difference with respect to other curculionidae and even other scolytinae species as it showed a sclerotized aedeagus with several pore-like structures in the terminal portion where sperm is released during mating.
First record of the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), in Pará nut, Bertholletia excelsa (Lecythidaceae)
Gumier-Costa, Fabiano;
Neotropical Entomology , 2009, DOI: 10.1590/S1519-566X2009000300020
Abstract: we report the occurrence of hypothenemus hampei (ferrari) attacking pará nuts stored in the southeast of para state. the coffee berry borer successfully colonized and reproduced using pará nuts as a food source. based on this observation, the pará nuts can be used as an alternative food source in rearing the coffee berry borer. also, attention should be brought to need of proper storage of these nuts to avoid infestation by this pest.
Tritrophic analysis of the coffee (Coffea arabica) - coffee berry borer [Hypothenemus hampei (Ferrari)] - parasitoid system
Gutierrez, Andrew P.;Villacorta, Amador;Cure, Jose R.;Ellis, C. Ken;
Anais da Sociedade Entomológica do Brasil , 1998, DOI: 10.1590/S0301-80591998000300005
Abstract: an age-mass structured multi-year tritrophic simulation model of the coffee (coffea arabica var. mundo novo) - coffee berry borer [hypothenemus hampei (ferrari)], borer - three parasitoid system was developed. three years of extensive plant drymatter data and one year of field data on borer dynamics were collected at londrina, pr, brazil. the allometric relationships and parameter for plant drymatter allocation were estimated from the field data, but the parameters for borer and its three parasitoids were summarized from the literature. initial levels of soil factors (e.g., nitrogen and water) and observed weather data were used to drive the model. the model is largely independent of the field data, yet it simulated the dynamics of plant branching, fruiting and drymatter growth of plant subunits. simulation results suggest that of the three parasitoids commonly introduced to control the borer, only the eulophid adult endo-parasitoid (phymastichus coffea la salle) has the demographic characteristics to potentially regulate borer populations. the effects of harvesting, cleanup of abscised berries, inundative releases of parasitoids and pesticides with various toxicity and persistence characteristics on borer dynamics were evaluated. the model is very flexible, and may provide a sound foundation for incorporating new findings, new varieties, and the biology of new natural enemies worldwide
Evaluación de extractos vegetales para el control de la broca del café (Hypothenemus hampei, Ferrari)  [cached]
Jaime Ni?o O.,Angélica M. Bustamante,Yaned M. Correa N.,Oscar M. Mosquera M.
Scientia Et Technica , 2007,
Abstract: Este trabajo describe la evaluación por antibiosis de la actividad antibroca de 21 extractos metanólicos de las plantas recolectadas en la Reserva Natural Bremen-La Popa (Quindío). Los bioensayos se realizaron bajo condiciones controladas (23 ± 3 oC; 75 ± 5 % H.R.), utilizando como unidad experimental (UE) un tubo eppendorf al interior del cual se transfirió un grano de café pergamino impregnado del respectivo extracto a 1000 mg/L y una hembra adulta de broca. Se hicieron 90 UE por cada extracto. Cada cuatro días, por 40 días, se evaluaron dos UE de cada extracto para determinar los estados biológicos de la broca. Se encontró que algunos extractos metanólicos mostraron actividad contra la broca del café (Hypothenemus hampei, Ferrari).
Responses of Coffee berry borer, Hypothenemus hampei (Ferrari)(Coleoptera: Scolytidae), to vertical distribution of methanol: ethanol traps
Uemura-Lima, Daliana H;Ventura, Maurício U;Mikami, Adriana Y;Silva, Flávia C Da;Morales, Lauro;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000600013
Abstract: captures of the coffee berry borer (cbb) hypothenemus hampei (ferrari) were assessed in traps in the field. iapar designed traps [plastic bottles (2 l) lured with methanol:ethanol (1:1) in a vessel] were placed either at 0.5, 1.0 and 1.5m high from the ground or simultaneously tested in the 2004 fructification season. traps placed at the three heights trapped 5.5 times more cbb than the others, mostly at the traps placed at 0.5 m (75%). treatments using the iapar designed trap placed at 1.2 m high; iapar trap with a white plastic plate above (iapar modified i) at 1.2 m high; iapar at 0.5 m high and two additional vessels at 1.0 and 1.5m high (iapar modified ii) and t-163 trap [three red plastic cups (300 ml) and a red plastic plate as a cover] lured with m:e (1:1) at 1.2m height were compared in the vegetative (2005) and fructification (2006) periods. iapar modified ii (dispenser vessels placed at 0.5, 1.0 and 1.5 m) trapped more beetles than the remaining types (2.72 times more beetles than iapar design); and iapar modified i traps trapped more beetles than t 163 and iapar traps in the vegetative period. in the reproductive period, iapar modified ii trapped less beetles than iapar and iapar modified i. in 2007 vegetative season, iapar modified ii trap were compared with iapar trap and trapped 2.8 times more beetles. the positive responses to a vertical distribution of the volatile attractants in the vegetative period of the planting allow the development of more efficient trapping systems for cbb.
Life table of Hypothenemus hampei (Ferrari) in relation to coffee berry phenology under Colombian field conditions
Ruiz-Cárdenas, Ramiro;Baker, Peter;
Scientia Agricola , 2010, DOI: 10.1590/S0103-90162010000600007
Abstract: the overlap of generations of coffee berry borer (cbb), hypothenemus hampei (ferrari) under field conditions in countries like colombia hinders the construction of life tables by the sampling of natural populations. in this paper, a field methodology to carry out regular measurements of cbb cohorts inside coffee berries of different ages until harvest, both in coffee trees and in infested berries placed on the ground, is developed and used to compare the life history parameters of cbb. populations with berries at six ages in three experimental stations (without cbb control) and in a commercial farm in colombia (with chemical cbb control regularly carried out) were used. the duration of the pre-oviposition period as well as the mortality and survival rates of founder females and the proportion of founders leaving infested berries were strongly influenced by the consistency of berries, with optimum conditions for cbb reproduction as from 120-150 days after flowering. no differences were found between stations for the number of cbb developmental stages; but they had larger values than the commercial farm. the latter also had more than twice the average rate of founders leaving infested berries recorded in the stations. survival functions (cumulative probabilities of survival) for the pest differed among treatments and between the plant and ground micro-environments. age of berries at infestation was positively related to the intrinsic rate of increase of borer population; whilst generation time and doubling time were inversely related. no differences were found between sites for the main demographic parameters of the pest.
Diversidade de fungos filamentosos associados a Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) e suas galerias em frutos de Coffea canephora (Pierre)
Gama, Farah de C.;Teixeira, César A.D.;Garcia, Alvanir;Costa, José N.M.;Lima, Daniela K.S.;
Neotropical Entomology , 2006, DOI: 10.1590/S1519-566X2006000500002
Abstract: field sampling was carried out in ouro preto d'oeste rond?nia (10°45's and 62°15'w) to evaluate the mycobiota associated with hypothenemus hampei ferrari [cuticle, mouth, prothorax (mycangia), gut and feces] and its galleries on berries of coffea canephora pierre. ten genera (201 isolates) were directly related with the insect while five genera (20 isolates) were related with galleries on berries. all the genera identified in the insects were also present in their galleries, what indicates that boring may be an active way of fungi inoculation by h. hampei. the fungi genera were more diverse in the mouth and prothorax of borers, and lower in feces. fusarium, penicillium and geotrichum, with abundance of 55.7, 24.3 and 10.8%, respectively, were dominant genera. in the galleries fusarium, geotrichum, trichoderma and aspergillus with abundance of 33.3, 29.6, 18.5 and 14.8%, respectively, were dominant genera. the overall presence of fusarium in coffee berry borer and its galleries) reinforces previous indications of a close interaction between h. hampei-fusarium. the presence of aspergillus and penicillium emphasizes the possibility of "ochratoxin dispersion" by the borer. this work provides the first record of the mycobiota associated with h. hampei in c. canephora. among the identified genera, cephalosporium, geotrichum and oidiodendrum were recorded for the first time in association with h. hampei and its galleries in c. canephora.
Evaluación de atrayentes para la captura de hembras adultas de broca del café hypothenemus hampei (ferrari) con trampas artesanales
Moreno Rodríguez,Davis; álvarez Nú?ez,Andrea; Vázquez Moreno,Luis L; Alfonso Simonetti,Janet;
Fitosanidad , 2010,
Abstract: coffee berry borer hypothenemus hampei (ferrari) was informed in cuba in 1995 and nowadays it is present in most of the producing areas along the country. in this way the search of alternatives for its management has not ceased from their introduction and at the present time there is a group of them of feasible use. among these methods the use of rustic traps has an outstanding place because it is a simple and economic option. however the more effective alcoholic attractive for the adults capture had not been determined in cuban conditions. in this sense a work was realized with the objective of evaluating the effectiveness of ethyl alcohol from sugar cane alone and mixed with methyl alcohol and roast grinded coffee, as attractive for the coffee berry borer. the experiment was carried out in pre harvesting phase of a coffee plantation in pinar del río province, in the west part of the country. significant differences were proven among the three treatments. the best capture values were detected with the mixture of methyl alcohol+ethyl alcohol in the proportion 3:1, and lowest values were recorded when the alone ethylic alcohol was used. the feasibility of using ethyl alcohol of sugar cane as attractive of h. hampei was demonstrated and two tendencies in the behaviour of captures in time according to treatment were observed.
Diversidad de especies de hormigas (Hymenoptera: Formicidae) en cafetales afectados por Hypothenemus hampei Ferrari (Coleoptera: Curculionidae: Scolytinae)
Vázquez Moreno,Luis. L; Matienzo Brito,Yaril; Alfonso Simonetti,Janet; Moreno Rodríguez,Davis; álvarez Nú?ez,Andrea;
Fitosanidad , 2009,
Abstract: the conservation of coffee berry borer (hypothenemus hampei ferrari) natural enemies has great importance for cuban coffee plantations; in this way a study of ants predators was carried out in the empresa cafetalera bahía honda, in pinar del río province during the crop of 2006, monthly evaluation was realized in six coffee plantations located to 200 meters some of other, with different soil and shade management. ants was sampling in three vertical strata by means of trapping stations. in the own plants the index of coffee berry borer infestation was evaluated in each one of three productive branches by level. there were captured 1473 individuals of five ants species: wasmannia auropunctata (roger), solenopsis geminata (fabricius), tetramorium bicarinatum (nylander), monomorium floricola (jerdon) and pheidole megacephala (fabricius), the most abundant species was w. auropunctata. a bigger diversity of ants was observed in the order of preference floor>stem>bearing; traditional field type with forest trees, wrap pruning and cocoa tree trash reached the biggest diversity in the three studied strata. a narrow relationship was observed among the fields of smaller h. hampei infestation index and those of more antsspecies diversity, where t. bicarinatum and s. geminata prevailed, this suggests the necessity to continue the study of ants potentialities as biological controllers.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.