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Genetic selection, evaluation and management of nondiapause Aphidoletes aphidimyza (Rondani) (Diptera : Cecidomyiidae) for control of greenhouse aphids in winterGilkeson, Linda A. January 1986 (has links)
No description available.
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Genetic selection, evaluation and management of nondiapause Aphidoletes aphidimyza (Rondani) (Diptera : Cecidomyiidae) for control of greenhouse aphids in winterGilkeson, Linda A. January 1986 (has links)
No description available.
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The ecology of Melangyna viridiceps and Simosyrphus grandicornis (Diptera : Syrphidae) and their impact on populations of the rose aphid, Macrosiphum rosaeSoleyman-Nezhadiyan, Ebrahim. January 1996 (has links) (PDF)
Bibliography: leaves 213-233. This thesis studies the influence of the two common syrphid species on populations of rose aphids in rose gardens in Adelaide. The study determines whether the provision of attractive flowers increases the suppressive effect of syrphids on rose aphids and analyses some ecological and biological aspects of two syrphid species -- Melangyana viridiceps (Macquart) and Simosyrphus grandicornis (Macquart) -- in a Mediteranean climate to obtain a better understanding of their biological control potential.
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The ecology of Melangyna viridiceps and Simosyrphus grandicornis (Diptera : Syrphidae) and their impact on populations of the rose aphid, Macrosiphum rosae / by Ebrahim Soleyman-Nezhadiyan.Soleyman-Nezhadiyan, Ebrahim January 1996 (has links)
Bibliography: leaves 213-233. / xiii, 255 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis studies the influence of the two common syrphid species on populations of rose aphids in rose gardens in Adelaide. The study determines whether the provision of attractive flowers increases the suppressive effect of syrphids on rose aphids and analyses some ecological and biological aspects of two syrphid species -- Melangyana viridiceps (Macquart) and Simosyrphus grandicornis (Macquart) -- in a Mediteranean climate to obtain a better understanding of their biological control potential. / Thesis (Ph.D.)--University of Adelaide, Dept. of Crop Protection, 1997
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Introduction of Aphidius rosae into Australia for biological control of the rose aphid (Macrosiphum rosae)Kitt, Jörg Thomas. January 1996 (has links) (PDF)
Bibliography: leaves 221-240. This thesis deals with the introduction of "Aphidius rosae" as a classical biological control agent into South-Eastern Australia. Appropriate host specificity tests are carried out. Laboratory experiments are also completed to gain a better understanding of the interactions between host and parasitoid in the field. The study aims to monitor the performance of the control agent in the Adelaide environment for the first two years after initial release. It is also planned to invent an experimental field technique to estimate the impact of the control agent on rose aphid populations.
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Oxidation of plant allelochemicals by phytophagous sucking insectsLorraine, Debrah F. January 1995 (has links) (PDF)
Addendum in pocket. Biblography: leaves 162-173. Phytophagous sucking insects, aphids in particular, are common pests of plants. These insects secrete salivary enzymes into their food material. One plant defence mechanism is the induction and/or accumulation of deterrent phytochemicals. In the present study, a model enzyme system was chosen to mimic the oxidative activity of insect saliva. Isolation and sructural identification of the products of plant allelochemicals was achieved for several substrates. Insects were also exposed to individual plant chemicals in feeding "choice" tests. Preliminary examinations suggest that plants containing increased levels of phenolic allelochemicals show correlated increases in resistance to attack by aphids.
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Introduction of Aphidius rosae into Australia for biological control of the rose aphid (Macrosiphum rosae) / by Jorg Thomas Kitt.Kitt, Jorg Thomas January 1996 (has links)
Bibliography: leaves 221-240. / viii, 240, [13] leaves : ill. (some col.), maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis deals with the introduction of "Aphidius rosae" as a classical biological control agent into South-Eastern Australia. Appropriate host specificity tests are carried out. Laboratory experiments are also completed to gain a better understanding of the interactions between host and parasitoid in the field. The study aims to monitor the performance of the control agent in the Adelaide environment for the first two years after initial release. It is also planned to invent an experimental field technique to estimate the impact of the control agent on rose aphid populations. / Thesis (Ph.D.)--University of Adelaide, Dept. of Crop Protection, 1997
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Oxidation of plant allelochemicals by phytophagous sucking insects / by Debrah F. Lorraine.Lorraine, Debrah F. January 1995 (has links)
Addendum in pocket. / Biblography: leaves 162-173. / v, 177, [5] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Phytophagous sucking insects, aphids in particular, are common pests of plants. These insects secrete salivary enzymes into their food material. One plant defence mechanism is the induction and/or accumulation of deterrent phytochemicals. In the present study, a model enzyme system was chosen to mimic the oxidative activity of insect saliva. Isolation and sructural identification of the products of plant allelochemicals was achieved for several substrates. Insects were also exposed to individual plant chemicals in feeding "choice" tests. Preliminary examinations suggest that plants containing increased levels of phenolic allelochemicals show correlated increases in resistance to attack by aphids. / Thesis (Ph.D.)--University of Adelaide, Dept. of Crop Protection, 1996
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Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resourcesAmbrosino, Mario D. 13 March 2006 (has links)
Four key aspects of the relationship between predatory hoverflies and the aphid
pest Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley,
Oregon USA: 1) the relationship between aphid density and hoverfly oviposition, 2) the
larval voracity of key hoverfly species, 3) the preferences of hoverflies and broccoli pests
for candidate insectary plant species, and 4) the role of insectary plantings in enhancing
hoverfly oviposition in aphid colonies in broccoli fields.
Hoverfly oviposition at two commercial broccoli field sites increased at aphid
densities greater than 50 aphids per plant, but did not peak at the highest aphid densities.
A logistic regression model, selected with Akaike's Information Criterion, of the odds of
oviposition in relation to aphid density included effects for sampling date and aphid
species (B. brassicae and Myzus persicae (Suizer)). The magnitude of the response was
similar for B. brassicae and M persicae. The oviposition response was greater in the
upper part of the plant canopy, and different on individual leaves from that seen on whole
plants.
The voracity and development rate of Scaeva pyrastri (L.) were greater than those
of Eupeodes fumipennis (Thomson), and both exceeded Syrphus opinator Osten Saken
and Sphaerophoria suiphuripes (Thomson). Both E. fumipennis and S. opinator reduced
aphid populations to low levels on plants over two weeks, but E. fumipennis spent much
of the time foraging away form the caged plants.
Alyssum (Lobularia maritima (L.) Desv.), coriander (Coriandrum sativa L.),
buckwheat (Fagropyrum esculentum Moench), and phacelia (Phacelia tanacetifolia
Benth.) were screened for arthropod visitation frequency. The three pest species Pieris
rapae (L.), Diabrotica undecimpunctata undecimpunctata Mannerheim, and Lygus
hesperus Knight visited phacelia the most frequently, while the hoverfly species visited
mostly coriander, which was possibly influenced by competition from other foragers.
Hoverfly oviposition was increased near within-field blocks of alyssum in
broccoli fields at the end of the season however, hoverflies arriving at the field had pollen
in their guts and were oviparous four to five weeks before their eggs were detected in
aphid colonies. This late oviposition may have occurred because threshold densities for
oviposition were not reached until this stage. / Graduation date: 2006
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