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Sule Keskin, Erkan Yalçin, Hazim Özkaya
The objective of this study was to investigate the effects of storage and granary weevil, Sitophilus granarius (L.; Coleoptera: Curculionidae), infestation on pH, protein solubility (PS) and gel electrophoresis properties of meal and roller-milled flours of hard (Ceyhan-99 cv.) and soft (Eser cv.) wheat cultivars, respectively, after 6 mo of storage. Sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) technique was applied for studying the electrophoretic properties. Hard and soft wheats were infested with non-sexed S...
February 24, 2018: Journal of Economic Entomology
Francisco Infante
Coffee (Coffea arabica and C. canephora) is one of the most widely traded agricultural commodities and the main cash crop in ca. 80 tropical countries. Among the factors that limit coffee production, the coffee berry borer, Hypothenemus hampei (Ferrari) has been considered the main insect pest, causing losses of over US$500 million dollars annually. Control of this pest has been hindered by two main factors: the cryptic nature of the insect (i.e., protected inside the coffee berry), and the availability of coffee berries in the field allowing the survival of the pest from one generation to the next...
March 12, 2018: Journal of Agricultural and Food Chemistry
Octavio Menocal, Paul E Kendra, Wayne S Montgomery, Jonathan H Crane, Daniel Carrillo
Ambrosia beetles have emerged as significant pests of avocado ((Persea americana Mill. [Laurales: Lauraceae])) due to their association with pathogenic fungal symbionts, most notably Raffaelea lauricola T.C. Harr., Fraedrich & Aghayeva (Ophiostomatales: Ophiostomataceae), the causal agent of the laurel wilt (LW) disease. We evaluated the interaction of ambrosia beetles with host avocado trees by documenting their flight height and daily flight periodicity in Florida orchards with LW. Flight height was assessed passively in three avocado orchards by using ladder-like arrays of unbaited sticky traps arranged at three levels (low: 0-2 m; middle: 2-4 m; high: 4-6 m)...
March 8, 2018: Journal of Economic Entomology
Waleska Vera, Jan Bergmann
The grape weevil, Naupactus xanthographus Germar (Coleoptera: Curculionidae), is a polyphagous insect native to southern South America that causes considerable damage in grape and other fruit species. In this study, the morphology and ultrastructure of the antennae and the antennal sensilla of N. xanthographus were investigated using scanning electron microscopy and transmission electron microscopy. The antennae consist of a scape, a pedicel, a funicle, and a zone called the "club," which are all formed by a total of 12 antennomers...
March 12, 2018: Microscopy Research and Technique
Konstantin Nadein, Oliver Betz
We describe the kinematics and performance of the natural jump in the weevil Orchestes fagi (Fabricius, 1801) (Coleoptera: Curculionidae) and its jumping apparatus with underlying anatomy and functional morphology. In weevils, jumping is performed by the hind legs and involves the extension of the hind tibia. The principal structural elements of the jumping apparatus are (1) the femoro-tibial joint, (2) the metafemoral extensor tendon, (3) the extensor ligament, (4) the flexor ligament, (5) the tibial flexor sclerite and (6) the extensor and flexor muscles...
February 26, 2018: Arthropod Structure & Development
Marisol De-la-Mora, Daniel Piñero, Ken Oyama, Brian Farrell, Susana Magallón, Juan Núñez-Farfán
The family Curculionidae (Coleoptera), the "true" weevils, have diversified tightly linked to the evolution of flowering plants. Here, we aim to assess diversification at a lower taxonomic level. We analyze the evolution of the genus Trichobaris in association with their host plants. Trichobaris comprises eight to thirteen species; their larvae feed inside the fruits of Datura spp. or inside the stem of wild and cultivated species of Solanaceae, such as potato, tobacco and tomato. We ask the following questions: 1) does the rostrum of Trichobaris species evolve according to the plant tissue used to oviposit, i...
February 24, 2018: Molecular Phylogenetics and Evolution
Maisarah Mohamad Saad, Muhammad Matiar Rahaman, Michael J Stout
The resistance of commercial rice (Oryza sativa L.) varieties widely grown in Louisiana was assessed against the rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), the major insect pest of rice in the United States, in a 5-yr field study that included conventional inbred, herbicide-tolerant, and hybrid varieties. Resistance was evaluated by comparing densities of immature rice water weevils (larvae and pupae) in root-soil core samples taken at two time points after flooding. Randomized block experiments were conducted in two different locations to enable identification of potentially resistant varieties over diverse environments...
February 9, 2018: Environmental Entomology
Ó Dembilio, Pilar Moya, Sandra Vacas, Lola Ortega-García, Enrique Quesada-Moraga, Josep A Jaques, Vicente Navarro-Llopis
BACKGROUND: A new Beauveria bassiana-based Attract and Infect Device (AID) to control Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae) was developed. The virulence and persistence of the fungal formulation used in the AID was evaluated in laboratory. Semi-field and field trials were carried out to validate results and establish the potential of this device as a control tool. RESULTS: In laboratory conditions, an LT50 of 4.33 days was obtained when adults (7-10 day-old) were exposed to the Inoculation Tunnel (IT) containing 1 × 1010 conidia/g in an oil-based fungal formulation...
February 9, 2018: Pest Management Science
Albert E Mayfield, Jackson Audley, Robert Camp, Bryan T Mudder, Adam Taylor
The walnut twig beetle (Pityophthorus juglandis Blackman) (Coleoptera: Curculionidae) is a regulated pest in the United States due to its causal role in thousand cankers disease of walnut trees, including the commercially valuable eastern black walnut (Juglans nigra L.). Several state quarantines designed to limit spread of P. juglandis regulate movement of kiln-dried walnut lumber that contains bark. Previous research demonstrated that P. juglandis will enter and re-emerge from bark of kiln-dried, J. nigra slabs subjected to extreme beetle pressure (baited with a pheromone lure and hung in infested J...
February 5, 2018: Journal of Economic Entomology
B L Blood, W E Klingeman, M A Paschen, Ð Hadžiabdic, J J Couture, M D Ginzel, Lukasz Stelinski
Thousand cankers disease (TCD) is a pest complex formed by the association of the walnut twig beetle (WTB), Pityophthorus juglandis Blackman (Coleoptera: Curculionidae: Scolytinae), with the fungal pathogen Geosmithia morbida Kolařík, Freeland, Utley and Tisserat (Ascomycota: Hypocreales: Bionectriaceae). Current monitoring and detection efforts for WTB rely on a pheromone lure that is effective over a limited distance while plant- and fungal-derived volatiles that may facilitate host location remain poorly understood...
January 24, 2018: Environmental Entomology
William P Shepherd, Brian T Sullivan
Local outbreak risk for the southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae), is forecast with a trapping survey conducted every spring throughout the southeastern United States. Traps baited with pine odors and components of the D. frontalis aggregation pheromone are used to obtain abundance estimates of both this species and its clerid predator Thanasimus dubius (F.) (Coleoptera: Cleridae); these data are entered into a predictive model that estimates outbreak risk. An attractant synergist for D...
January 1, 2018: Journal of Insect Science
Łukasz Kajtoch, Matteo Montagna, Marek Wanat
Curculionidae is a hyperdiverse group of beetles, whose taxonomy and phylogenetics is still poorly understood, especially at the genus level. The latest work on the evolution of Apionini showed a noticeable "mess" in the subtribe Oxystomatina, where most of the morphology-based genera were found to be polyphyletic or paraphyletic. These discrepancies between classical taxonomy and molecular phylogenetics implied the need for further taxonomic revision of these groups. Here, we used sets of morphological, molecular and ecological characters to verify the taxonomic statuses and disentangle the phylogenetic relations among the Bothryorrhynchapion apionids, which are classified as a subgenus of Cyanapion...
December 20, 2017: Molecular Phylogenetics and Evolution
Roman Borovec, Jiří Skuhrovec
The Afrotropical species described as Trachyphloeini Lacordaire, 1863 were examined and their taxonomic status is revised. Atrachyphloeus Voss, 1962 is proposed as a junior synonym of Phaylomerinthus Schoenherr, 1842, Cathormiocerus africanus Hoffmann, 1965 as a junior synonym of Tapinomorphus sylvicola Voss, 1962 and Trachyphloeus pustulifer Voss, 1959 as a junior synonym of Platycopes tuberculatus Marshall, 1906. Atrachyphloeus convergens Voss, 1962 is transferred to the genus Phaylomerinthus Schoenherr, 1842, Trachyphloeus hardenbergi Marshall, 1923 and T...
November 8, 2017: Zootaxa
Sudabe Amini, Jamasb Nozari, Michail Yu Mandelshtam, Miloš Knížek, Vahid Etemad, Massimo Faccoli
Bark and ambrosia beetles from the subfamily Scolytinae are among the most important pests in forests of Northern Iran. During investigations conducted in 2013-2016 in different parts of northern forests, the species Crypturgus cribrellus Reitter, Liparthrum bartschti Mühl, Scolytus varshalovitchi Michalski, Scolytus sulcifrons Rey, Scolytus triarmatus (Eggers) and Trypophloeus granulatus (Ratzeburg) were recorded for the first time in Iran; Trypophloeus and Liparthrum were new genera for Iran. As new host plants we found Zelkova sp...
November 17, 2017: Zootaxa
Yuri G Arzanov, Vasily V Grebennikov
We summarize knowledge of the weevil tribe Cleonini worldwide, including its monophyly, relationships, distribution, biology, immature stages, economic significance and paleontology. We score adult morphological characters for 79 of a total of 96 extant genus-group Cleonini taxa considered valid to date. The resulting matrix contains 121 parsimoniously informative characters scored for 145 ingroup (Cleonini) and 29 outgroup terminals. Maximum Parsimony (MP) and Bayesian Inference (BI) analyses consistently recover monophyletic Lixinae and Cleonini...
October 3, 2017: Zootaxa
Cesare Bello, Giuseppe Osella, Cosimo Baviera
The genus Dodomeira Bellò & Baviera gen. n. of the tribe Peritelini Lacordaire (1863) (Curculionidae: Entiminae) which includes 39 species is described. Seven species are transferred from Pseudomeira Stierlin, 1881: Dodomeira confusa (Pierotti, 2012) comb. n., Dodomeira exigua (Stierlin, 1861) comb. n., Dodomeira ficuzzensis (Bellò & Baviera, 2011) comb. n., Dodomeira himerensis (Bellò & Baviera, 2011) comb. n., Dodomeira petrensis (Bellò & Baviera, 2011) comb. n., Dodomeira pfisteri (Stierlin, 1864) comb...
October 13, 2017: Zootaxa
Masaaki Ito, Hisashi Kajimura
In this study, we examined the genetic structures of the ambrosia fungus isolated from mycangia of the scolytine beetle, Xylosandrus germanus to understand their co-evolutionary relationships. We analyzed datasets of three ambrosia fungus loci (18S rDNA, 28S rDNA, and the β-tubulin gene) and a X. germanus locus dataset (cytochrome c oxidase subunit 1 ( COI ) mitochondrial DNA). The ambrosia fungi were separated into three cultural morphptypes, and their haplotypes were distinguished by phylogenetic analysis on the basis of the three loci...
November 2017: Ecology and Evolution
Celal Tuncer, Milos Knizek, Juri Hulcr
Hazelnut, a very important cash crop in Turkey, is frequently colonized by bark and ambrosia beetle species ( Scolytinae ). Some scolytine species may cause economic damage while other species do not; therefore, proper identification is important in orchard management. Extensive sampling demonstrated that the most common pest species in Turkey's hazelnut orchards are Anisandrus dispar , Xylosandrus germanus , and Xyleborinus saxesenii. Hypothenemus eruditus can also be common, but only colonizes branches that are already dead...
2017: ZooKeys
Amanda St Onge, Héctor A Cárcamo, Maya L Evenden
The pea leaf weevil (PLW), Sitona lineatus L., is a pest of field pea (Pisum sativum L.) and faba bean (Vicia faba L.) that recently invaded the Canadian Prairie Provinces. Although most damage is done by larvae that feed on root nodules, adults are easier to monitor than larvae. Both male and female weevils respond to a male-produced aggregation pheromone and to volatiles released by host plants. The current study tests the attractiveness of synthetic aggregation pheromone, 4-methyl-3,5-heptanedione, and host plant volatiles linalool, (Z)-3-hexenol, and (Z)-3-hexenyl acetate to PLWs in spring when weevils are reproductively active and in fall when weevils seek overwintering sites...
February 8, 2018: Environmental Entomology
A K Román-Ruiz, F Ribeyre, J C Rojas, L Cruz-López, J F Barrera, B P Dufour
The coffee berry borer (CBB), Hypothenemus hampei (Ferrari), is a multivoltine species closely associated with coffee crops worldwide, causing severe damage to the bean. In Mexico, as in all tropical regions, CBB survives during the inter-harvest period in residual berries on the ground or in dry berries remaining on the branches, and then disperses in search of the first suitable berries. In this study, we investigated how CBB dispersed from the first infested nodes during the fruiting period of Coffea canephora Pierre, which provides a favourable trophic level for this insect...
November 23, 2017: Bulletin of Entomological Research
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