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Evaluation of semiochemical based push-pull strategy for population suppression of ambrosia beetle vectors of laurel wilt disease in avocado.
Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae and Platypodinae) bore into tree xylem to complete their life cycle, feeding on symbiotic fungi. Ambrosia beetles are a threat to avocado where they have been found to vector a symbiotic fungus, Raffaelea lauricola, the causal agent of the laurel wilt disease. We assessed the repellency of methyl salicylate and verbenone to two putative laurel wilt vectors in avocado, Xyleborus volvulus (Fabricius) and Xyleborus bispinatus (Eichhoff), under laboratory conditions. Then, we tested the same two chemicals released from SPLAT flowable matrix with and without low-dose ethanol dispensers for manipulation of ambrosia beetle populations occurring in commercial avocado. The potential active space of repellents was assessed by quantifying beetle catch on traps placed 'close' (~5-10 cm) and 'far' (~1-1.5 m) away from repellent dispensers. Ambrosia beetles collected on traps associated with all in-field treatments were identified to species to assess beetle diversity and community variation. Xyleborus volvulus was not repelled by methyl salicylate (MeSA) or verbenone in laboratory assays, while X. bispinatus was repelled by MeSA but not verbenone. Ambrosia beetle trap catches were reduced in the field more when plots were treated with verbenone dispensers (SPLAT) co-deployed with low-dose ethanol dispensers than when treated with verbenone alone. Beetle diversity was highest on traps deployed with low-dose ethanol lures. The repellent treatments and ethanol lures significantly altered the species composition of beetles captured in experiment plots. Our results indicate that verbenone co-deployed with ethanol lures holds potential for manipulating ambrosia beetle vectors via push-pull management in avocado. This tactic could discourage immigration and/or population establishment of ambrosia beetles in commercial avocado and function as an additional tool for management programs of laurel wilt
New Reports of Exotic and Native Ambrosia and Bark Beetle Species (Coleoptera: Curculionidae: Scolytinae) From Ohio
In a 2007 survey of ambrosia and bark beetles (Coleoptera: Curculionidae: Scolytinae) along a transect in northeastern Ohio, we collected six exotic and three native species not previously reported from the state. These species include the exotic ambrosia beetles Ambrosiodmus rubricollis (Eichhoff), Dryoxylon onoharaensum (Murayama), Euwallacea validus (Eichhoff), Xyleborus californicus Wood, Xyleborus pelliculosusEichhoff, and Xylosandrus crassiusculus (Motschulsky). The native ambrosia beetle Corthylus columbianus Hopkins, and the native bark beetles Dryocoetes autographus (Ratzeburg) and Hylastes tenuis Eichhoff are also reported from Ohio for the first time. Our study suggests a northward range expansion for five of the six exotic species including, X. crassiusculus, which is an important pest of nursery and orchard crops in the southeastern United States
New Records of Native and Non-Native Bark and Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae) in Illinois
From 2009–2012, we conducted surveys with Lindgren funnel traps for native and non-native bark and ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) in northeastern Illinois. During this study, we collected a total of 10,194 bark and ambrosia beetles representing 50 species in 28 genera. Ten scolytine species not previously reported to occur in Illinois were collected during this survey. Three of these new records are species not native to North America, including Cyclorhipidion bodoanum (Reitter), Cyclorhipidion pelliculosum (Eichhoff), and Hylastinus obscurus (Marsham). Native species reported from Illinois for the first time include: Anisandrus obesus (LeConte), Dryocoetes autographus (Ratzeburg), Hylocurus spadix Blackman, Pityophthorus cariniceps LeConte, Pityophthorus puberulus (LeConte), Pseudothysanoes lecontei Blackman, and Xyleborinus gracilis (Eichhoff). The results presented here will update and improve the somewhat limited information regarding the overall bark and ambrosia beetle community in northeastern Illinois
Forestry timber typing. Tanana demonstration project, Alaska ASVT
The feasibility of using LANDSAT digital data in conjunction with topographic data to delineate commercial forests by stand size and crown closure in the Tanana River basin of Alaska was tested. A modified clustering approach using two LANDSAT dates to generate an initial forest type classification was then refined with topographic data. To further demonstrate the ability of remotely sensed data in a fire protection planning framework, the timber type data were subsequently integrated with terrain information to generate a fire hazard map of the study area. This map provides valuable assistance in initial attack planning, determining equipment accessibility, and fire growth modeling. The resulting data sets were incorporated into the Alaska Department of Natural Resources geographic information system for subsequent utilization
Scientific Opinion on the effect on public or animal health or on the environment on the presence of seeds of Ambrosia spp. in animal feed
The European Commission requested EFSA to provide a scientific opinion on the effect on public or animal health or on the environment on the further distribution of Ambrosia spp. in the European Union and on the importance of feed materials, in particular bird feed, in the dispersion of Ambrosia spp. The genus Ambrosia (Asteraceae family) is distributed worldwide. Ambrosia artemisiifolia (common ragweed) has heavily colonised several areas of South-East Europe. Ambrosia spp., both in their native range and in invaded areas, are of public health concern due to the allergenic properties of their pollen. The NDA Panel concluded that inhalation of the plant pollen causes rhino-conjunctivitis and asthma, with skin allergies and food allergy playing minor roles. Ambrosia may cross-sensitize patients to other allergens, including food allergens. There is some evidence for allergenicity of Ambrosia pollen in animals. With regard to the effects on the environment of the further distribution of Ambrosia spp. in the European Union, the PLH Panel concluded that there is no direct evidence that Ambrosia spp. cause extinction of plant species. However, there are some indications that A. artemisiifolia could become highly invasive in certain environmentally-valuable habitats and might be linked to an impoverishment of species richness, therefore further ecological studies are needed. The CONTAM Panel focused on the relative importance of animal feed, bird feed in particular, on the dispersion of Ambrosia. Ambrosia seeds may contaminate feed. However, animal feed materials compounded for use in livestock are extensively processed. This processing destroys Ambrosia seeds and hence the contribution of compounded feed to the dispersion of Ambrosia is considered to be negligible. Bird feed often contains significant quantities of Ambrosia seeds and remains unprocessed. Therefore, bird feed seems to play an important role in introducing Ambrosia to new, previously not infested areas
Ambrosia artemisiifolia L., nueva especie para la flora alóctona invasora de AndalucÃa (España)
Ambrosia artemisiifolia, a new species for the aloctonous invasive flora of Andalusia (Spain)Palabras clave. Ambrosia artemisiifolia, planta invasora, AndalucÃa, España.Key words. Ambrosia artemisiifolia, invasive plant, Andalusia flora, Spain
The Analysis of College Students Knowledge, Attitudes. Behaviors, and Perceptions Concerning Sexually Transmitted Infections
The purpose of this study was to further research, more in-depth, college student\u27s attitudes, knowledge, and behaviors concerning sexually transmitted infections and unsafe sexual practices using the Health Belief Model as a framework. By utilizing an electronic survey and social media a non-probability convenience sample of 167 students was assessed. This study was given to undergraduate and graduate students at a midwestern college campus and was intended to evaluate college student\u27s knowledge, attitudes, behaviors, and perceptions concerning sexually transmitted infections. Two major findings were that less than half of the participants were tested for STI\u27s yearly; and there was no relationship between gender and concern of contracting an STI. To improve the state of college students concerning sexually transmitted infections, colleges need to make aware health clinics in the area that offer testing and create college courses that educate students about sexually transmitted infections
Annotated List of Indiana Scolytidae (Coleoptera)
A list of 80 species of Indiana Scolytidae (bark and ambrosia beetles) is presented. Notes on known Indiana hosts and distribution in the state are included for each species
Terrain Cover and Shadow Discrimination from Landsat Data of the Great Smoky Mountains National Park
Landsat satellite imagery of the Great Smoky Mountains in East Tennessee and Western North Carolina exhibits dark tonal reflectances within the Blue Ridge physiographic province unlike any other reflectance patterns found on the remainder of the imagery. Repetitive, seasonal imagery indicate that these unique patterns are dynamic. There also appear to be definable, minute reflectance variations within the patterns themselves, indicating that there are numerous factors accounting for the anomaly. Among the factors discussed are the cover characteristics of the red spruce (picea rubens) and Fraser fir or southern balsam fir (abies fraseri), effects of topography, slope, aspect and ridge orientation, effects of solar angle and azimuth, and shadow zones.
Data were collected for three test sites within the boundary of the Great Smoky Mountains National Park between January 1980 and October 1980. The selected areas were easily accessible and were studied in the field by the author. Landform characteristics were obtained from United States Geological Survey topographic maps of the region. Cover characteristics were obtained from field research and from ancillary data of the National Park Service, the Uplands Research Laboratory, and the University of Tennessee Department of Forestry.
Landsat spectral data were analyzed in a two step method. The first step consisted of visual and photo-mechanical enhancement techniques. This included obtaining Landsat image scenes from the Earth Resources Observations System Data Center (EROS). It was hoped that by utilizing numerous photo-processing techniques previously obscurred data could be enhanced, analyzed, and classified.
The second step consisted of applying a supervised computer classification program to a Landsat digital tape of the study area. The supervised classification program analyzes a Landsat scene on the basis of established training sites that correspond to known locations studied in the field. The computer classification proved more adaptable to enhancing and classifying discrete regions than did photo-mechanical techniques.
The study suggests that more research into the feasibility of utilizing Landsat multispectral data in areas of low accessibility or mountainous terrain needs to be developed. It also suggests that numerous factors influence scene spectral levels and that the best means of examining these factors is through computer classifications based on selected test sites
Annotated Bibliography of the Ambrosia Beetle \u3ci\u3eXylosandrus Germanus\u3c/i\u3e (Coleoptera: Scolytidae)
(excerpt)
Xylosandrus germanus (Blandford) (= Xyleborus germanus) is an ambrosia beetle that is found in Japan, Korea, the KurU Islands, Vietnam, China, Taiwan, central Europe, and the Cnited States (Nobuchi 1981). It attacks apparently healthy plants and those that are dying or recently dead (Weber 1982). Kaneko (1967) reported X. germanus to be a serious pest on tea (Thea sp.) plants in Japan, and Heidenreich (1%0) reported it on oak (Quercus sp.) trees in Gennany. This beetle seems to be increasing in economic importance on black walnut (Juglans nigra L.) and other hardwood species in the U.S. (Weber 1982)
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