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BIOCONT Laboratory s.r.o.   (Site not responding. Last check: 2007-09-12) V (x,y) is quantity of phytophagous mites destroyed by one predatory mite in a time unit at a certain population density of phytophagous mites. h(x,y) describes the influence of the ratio of the phytophagous miles population density to the predatory mites population density. In the absence of phytophagous mites the population density of predatory mites will decrease 2-fold in 100 days and with an abundance of prey the population density of predatory mites will increase 2-fold in 17 days. www.biocont.cz /publikace1.htm   (840 words)

BIOCONT Laboratory s.r.o.   (Site not responding. Last check: 2007-09-12) Phytophagous and predatory mites (Acari: Tetranychidae, Eriophyidae, Phytoseiidae, Stigmaeidae) in South Moravian vineyards, Czechoslovakia, treated with various types of chemicals. Chemically treated commercial vineyards where phytophagous tetranychid and eriophyid mites were known to occur in abundance were monitored in the region of South Moravia, Czechoslovakia, in 1987 and 1988. In these vineyards, the low population density of phytophagous mites was undoubtedly the result of predation of phytoseiids. www.biocont.cz /publikace6.htm   (3001 words)

Australia's Biodiversity - Responses to Fire - Plants, birds and invertebrates: Long-term effects of repeated ...   (Site not responding. Last check: 2007-09-12) The groups were; primarily phytophagous (Cicadellidae, Coccidae, Fulgoridae and the unidentified Homopteran), moist habitat specialists (Dipsocoromorpha), primarily predacious (Nabidae, Reduvidae) and others. The groups were; primarily phytophagous (Cecidomyiidae), primarily predacious (Tachydromiinae), fungal feeders (Sciaridae, Drosophilidae, Mycetophilidae and Scatopsidae), generalists and scavengers (Phoridae and Chloropidae), moist habitat specialists (Ceratopogonidae and Chironomidae), litter dwellers (Sphaeicieiidae and Tipilidae) and wide-ranging "tourists" (Piophilidae, Micropezidae, Dolichopodidae, Calliphoridae, Syrphidae, Thereuidae, Muscidae and Tachinidae). With regard to feeding strategy, there was on average, a 15, 140 and 250% increase (respectively) in the number of phytophagous (plant feeding) species of bugs, flies and beetles. deh.gov.au /biodiversity/publications/technical/fire/prescribed-6e.html   (2815 words)

NCDA & CS Plant Industry Division-Regulations: Phytophagous Snails   (Site not responding. Last check: 2007-09-12) A property on which phytophagous snails have been found, or a property onto which regulated material has been moved for any purpose from an infested property, and regulated or host material which has been exposed to, come in physical contact with, or been stored where the pest has been found. Regulated articles from quarantined areas that are infested with phytophagous snails or have been exposed to infestation by the pest may be ordered destroyed or fumigated by the Commissioner in accordance with G.S. 106-421 at the expense of the owner. Such conditions shall be consistent with the quarantine requirements of the exterior agency and shall be designed to prevent establishment or dissemination of phytophagous snails in North Carolina. www.agr.state.nc.us /PLANTIND/Regs/snailreg.htm   (612 words)

Florida Entomologist, v. 77, n. 2, p. 209 The 122 phytophagous species collected are listed and classified according to relative frequency of occurrence, guild, host range, plant part attacked, life stages collected, and associated goldenrod species. A phytophagous species was considered common if it was present in at least 50% of the collections, occasional if collected in 15 to 50% of the samples, and rare if present in less than 15% of the samples. Of the phytophagous insect species, 16 (13.1%) fed only on Solidago or on Solidago and Aster, seven (5.7%) fed on these plants as well as other Compositae, 94 (77%) were polyphagous and 5 (4.1%) had unknown hosts. www.fcla.edu /FlaEnt/fe77p209.html   (2788 words)

Quarantine of Phytophagous Snails Phytophagous snails as a group are considered to be serious agricultural pests. A property on which phytophagous snails have been found, or a property onto which regulated material has been moved for any purpose form an infested property, and regulated or host material which has been exposed to, come in physical contact with or being stored where the pest has been found. Regulated articles from quarantined areas that are infested with phytophagous snails or have been exposed to infestation by the pest may be ordered destroyed, fumigated or otherwise treated by the Director in accordance with ¤46-9-60, at the expense of the owner. drpsp.clemson.edu /dpi/snail.htm   (641 words)

Goldsmith: Colonising the plant world. That such a study is important seems clear, if one considers the sheer diversity of phytophagous insects; there are at least a third of a million species, a figure which is all the more impressive if one realises that there are only 8,500 species of birds and 4,500 species of mammals. This must clearly be so, for if the millions of different species of phytophagous insects had not learnt over the ages to become efficient predators or parasites of the plants on which they depended for their sustenance, they could not have survived. They consider that it is likely "that phytophagous insects had a strong hand in generating the bewildering biochemical diversity and the rich variety of growth forms, leaf shapes and seasonal phenologies of modern land plants". www.edwardgoldsmith.com /page126.html   (1760 words)

Biology of Eurytomidae The genus Systole is phytophagous in the seeds of Apiaceae, Evoxystoma in grape seeds, and Bruchophagus in the seeds of Fabaceae. The secondarily parasitic eurytomids often attack primary parasites in the Ichneumonoidea while the phytophagous eurytomids, known from at least 10 plant families (Zerova 1978), are miners, gallers or seed eaters. Phytophagous genera in the Neotropics include: Bephratelloides in seeds of Annonaceae; Bruchophagus in seeds of herbaceous Fabaceae; Prodecatoma in seeds of Myrtaceae, Vitaceae and Rubiaceae where they are apparently phytophagous; Systole in seeds of Apiaceae; and Tetramesa, which form galls in stems or seeds of Poaceae. www.sel.barc.usda.gov /hym/chalcids/eurytomid/biology.html   (1272 words)

intas 94-0930   (Site not responding. Last check: 2007-09-12) The aims of this project are the: definition of the amplitude of ecotonal zones; evaluation of the impact of phytophagous insects on border trees in alpine and Siberian ecosystems; and application of new monitoring techniques for the main pests and improvement of them, based on the knowledge of border effect. Phytophagous insects were sampled along the same transects by various techniques (registration of damaged food units such as leaves, shoots, cones and seeds, and trapping with visual and pheromone traps). The great majority of phytophagous insects seem to be more abundant on border and pioneer trees, even when epigeic arthropods did not reveal the presence of a transitional zone. www.intas.be /catalog/94-0930.HTM   (946 words)

Learning and plant selection Nonassociative learning occurs in response to one stimulus alone, and two of the most commonly studied forms are habituation (waning of a response as a result of repeated presentation of a stimuli), and sensitization (causing a gradual increase to a stimulus with repeated exposure, even when unpaired with any other stimulus). It is thought to occur as a consequence of post-ingestion metabolic upset (malaise) that arises either through poisoning of the insect by one or more ingested plant secondary compounds or through nutritional inadequacy of the ingested plant material (Bernays and Lee, 1988; Szentesi and Jermy, 1990). The ability to learn to eat less of the food or to reject it was correlated with the relative unacceptability of the food over time: the aversive response was most pronounced with the food which declined most in acceptability over a series of consecutive meals or which were initially less acceptable. www.msu.edu /user/miller20/ikhlas.htm   (2443 words)

Patterns of biodiversity   (Site not responding. Last check: 2007-09-12) Phytophagous insects are the most diverse group of organisms on earth. Thus, understanding the interactions between phytophagous insects and plants is an important step towards an understanding of the general evolutionary and ecological background of biodiversity. For insects we found that distributional history of trees, present tree abundance and tree height were important parameters to predict species richness of phytophagous insects. staff-www.uni-marburg.de /~oekolog/Forschung/macroecology.htm   (434 words)

File: <TORYMID Megastigmus, are probably all phytophagous in the seeds of plants; they are often reared from the seeds of conifers, Compositae and Anachardiaceae, with species of Biology.-- "The torymines are either phytophagous in seeds, or parasitic in galls of gall-forming insects such as cecidomyiid flies and cynipoid wasps.   Some are phytophagous but the majority develop in various galls and are usually regarded as parasites, but some may be inquilines consuming the gall tissues and thus competing with the actual gall-maker. faculty.ucr.edu /~legneref/taxonomy/torymid.htm   (2825 words)

Population dynamics and movement patterns of two phytophagous prairie beetles   (Site not responding. Last check: 2007-09-12) Little is known about how phytophagous prairie insects cope with the large-scale fragmentation of their habitat, although they comprise a large proportion of the biodiversity of prairie communities. In summer, 1998 we conducted mark-recapture experiments with two phytophagous beetles to determine their population dynamics and their ability to track their spatially variable host plants. The study species were Rhyssematus lineaticollis Say (Coleoptera: Curculionidae), a small (5-8mm long) roughened weevil herbivore of Asclepias syriaca, and Chrysochus auratus Fabricius (Coleoptera: Chrysomelidae), the goldsmith beetle, a common herbivore of dogbanes (Apocynum sp.) in Iowa. www.ent.iastate.edu /entsoc/ncb99/prog/abs/108.html   (190 words)

Planting Finding and Acceptance Behavior in Phytophagous Insects On the leaf surface of the wild potato, Solanum berthaultii, are glandular trichomes that have been shown to produce a feeding deterrent to the Colorado potato beetle, L. After the insect has evaluated the physical characteristics of the plant, the next step in the evaluation phase is test biting (or probing if the insect is phytophagous) of the plant tissue. A test bite is typically smaller than a regular bite and the plant material may be held in the pre-oral cavity for a longer period of time than during regular food intake (Schoonhoven et al., 1998). www.colostate.edu /Depts/Entomology/courses/en507/papers_2001/doles.htm   (4283 words)

Coprophagy on feces of phytophagous insects:   (Site not responding. Last check: 2007-09-12) In different terrestrial ecosystems systems, nutrient availability was attributed to enhanced photosynthetic rate or the translocation of nutrients from roots to re-growing plant tissue, or to increased soil nutrient availability and enhanced nutrient acquisition from soil through increased root exudation by defoliated plants, resulting in positive responses of soil biota. Nutrient release from feces of phytophagous animals through leaching and coprophagous behavior of saprophagous soil animals adds a further trophic level to soil-plant-animal interactions. These results provide evidence for compensatory re-growth of defoliated plants being promoted by nutrient release from feces of phytophagous insects, but further study is needed to support this hypothesis. www.uni-kiel.de /zoologie/institut/limnologie/insfeces.htm   (326 words)

Full Text - Plant protease inhibitors in control of phytophagous insects These genes have been used for the construction of transgenic crop plants to be incorporated in integrated pest management programmes. This article describes the classes of protease inhibitors, their regulation and genes used to construct transgenic plants against phytophagous insects. BOWN, D.P.; WILKINSON, H.S. and GATEHOUSE, J.A. Differentially regulated inhibitor sensitive and insensitive protease genes from the phytophagous insect pest, Helicoverpa armigera, are members of complex multigene families. www.ejbiotechnology.info /content/vol5/issue1/full/3   (10038 words)

Publications   (Site not responding. Last check: 2007-09-12) Anthropogenic transformation of forest biogeocenose and resistance of forests to outbreaks of insects - phytophagous //Methods of evaluation of condition and stability of forest ecosystems. Koltunov E.V. Mechanisms of resistance of the Ural forests to outbreaks of insects - phytophagous in anthropogenous influence. Koltunov E.V., Ponomarev V.I., Fedorenko S.I. The resistance factors of Urals birch forests to defoliation by insects – phytophagous in global antropogeneous influence // In: " The resistance of forests to influence of insect. www.uran.ru /structure/institutions/botgards/publications.htm   (1212 words)

Zoo-phytophagous Heteroptera Because many heteropteran generalist predators are also facultatively phytophagous, we need to consider the dual impact of plant stresses on crop yields and on these important biological control agents. Thus, a given virus cannot be assumed to cause only one set of responses in a host plant; leaf age and viral strain must also be considered. Effects of soybean mosaic virus on the facultatively phytophagous predator Orius insidiosus (Heteroptera: Anthocoridae). www.inhs.uiuc.edu /cee/wiedenlab/Heteroptera.html   (1030 words)

Mites (Acari) Chapter: Assessment of species diversity in the Montane Cordillera Ecozone   (Site not responding. Last check: 2007-09-12) Species of at least seven genera of Bdellidae and five genera of Cunaxidae are among the common predatory mites in litter and herbaceous ground cover habitats in the Montane Cordillera. All species of Tetranychoidea are obligately phytophagous, and several of them reach the northern limit of their distribution along with their host plants in the Okanagan region of the Ecozone. Most eriophyoids are highly host specific, and their feeding often causes characteristic symptoms on the host ranging from discolouration of foliage to production of striking galls or erineal secretions on foliage, flowers or fruits. naturewatch.ca /eman/reports/publications/99_montane/mites/mites05.html   (2728 words)

ARS | Publication request: Short-Distance Prey Location by Neoseiulus Californicus(mcgregor)(acari: Phytoseiidae): the ... Our results indicated that the volatiles associated with phytophagous mites, their byproducts, and the host plant, either separately or in combination, play an important role in short-distance location of the two-spotted spider mite by the predaceous mite. On the other hand, only a combination of two or more of these stimuli appeared to signal the location of nearby colonies of the European red mite to the predaceous mite, especially when the kairomones from their feces, eggs, and exuvia were included in such a blend. On the other hand, only a combination of two or more of those stimuli appear to signal the location of nearby colonies of P. ulmi to the predaceous mite, especially when the kairomones from their feces, eggs, and exuvia are included in such a blend. ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=145693   (530 words)

CHAPTER 27 A property on which phytophagous snails have been found, or a property onto which regulated material has been moved for any purpose from an infested property, and regulated or host material which has been exposed to, come in physical contact with or being stored where the pest has been found. Regulated articles from quarantined areas that are infested with phytophagous snails or have been exposed to infestation by the pest may be ordered destroyed, fumigated or otherwise treated by the Director in accordance with Section 46-9-60, at the expense of the owner. Regulated articles shall not be moved into, within, or from South Carolina nor shall they be processed, planted or propagated except under conditions stipulated by the Director or his agent. dpi.clemson.edu /snails.htm   (539 words)

Predicting Phytophagous Insect Mortality Due to Predators These and similar results in cotton suggest native predators can furnish biological control of phytophagous insect species in many of our orchard and field crops. The insect density evaluation system developed at NMSU has the potential of revolutionizing biological control of field crop and orchard insects by increasing the accuracy and speed and lowering the cost of evaluating phytophagous insect mortality due to beneficial insects. This system will assure growers when they can rely on beneficial insects for control instead of using insecticides. www.nmsu.edu /biocontrol/projects/predicting.htm   (132 words)

ENTOMOLOGY 135 Relationship Between Classical Biological Control of Phytophagous Insects and of Weeds   (Site not responding. Last check: 2007-09-12) ENTOMOLOGY 135 Relationship Between Classical Biological Control of Phytophagous Insects and of Weeds Highly host-specific phytophagous insects intentionally introduced without their natural enemies Natural enemies intentionally excluded so as to permit "outbreaks" of biological-control agent, designed to bring about classical biological control of target weed ucdnema.ucdavis.edu /imagemap/nemmap/ENT135/weedtable.htm   (71 words)

Phytophagous insects Unit III: Phytophagous Insects and Defenses of Plants Against Insects How does a phytophagous insect find its host plant? These include: phytoecdysones (with ecdysone activity), juvabione (a juvenile hormone mimic), and precocenes (which destroy the source of juvenile hormone and cause early metamorphosis to a sterile adult). www.uwrf.edu /~cg04/333/phytophagous.html   (705 words)

NYS IPM, Phytophagous Mirid Bugs   (Site not responding. Last check: 2007-09-12) Tree Fruit Fact Sheets > Phytophagous Mirid Bugs For a print version of this fact sheet, consult the Tree Fruit section of our Catalog. Copyright is held by Cornell University and the New York State IPM Program. www.nysipm.cornell.edu /factsheets/treefruit/pests/mb/miridbugs.html   (1362 words)

Amazon.ca: Books: Indian Phytophagous Scarabs and Their Management   (Site not responding. Last check: 2007-09-12) Amazon.ca: Books: Indian Phytophagous Scarabs and Their Management If you would like to purchase this title, we recommend that you occasionally check this page to see if it has become available. Top of Page : Indian Phytophagous Scarabs and Their Management www.amazon.ca /exec/obidos/ASIN/8177540793   (92 words)

Amazon.ca: Books: Host-Plant Selection by Phytophagous Insects   (Site not responding. Last check: 2007-09-12) This is a one-of-a-kind book for everyone interested in plant-feeding insects, and an important reference for undergraduates, graduate students, research scientists and agriculturists. Use Your Account to view or change your orders Top of Page : Host-Plant Selection by Phytophagous Insects www.amazon.ca /exec/obidos/ASIN/0412031310   (257 words)

Phytophagous Insects Database Derived from Literature and Other Sources Phytophagous Insects Database Derived from Literature and Other Sources Free text Search for Data centers, Projects, Instruments, Platforms/Sources Records derived from literature and other sources which identify insect species and the plants on which they feed. gcmd.gsfc.nasa.gov /records/GCMD_EIC03_PHYTOPHAGOUS_INSECTS.html   (111 words)

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