Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 156 for “"host plants"”.
-
Host plants of the tobacco flea beetle, Epitrix parvula F.
A study of the host plants of the tobacco flea beetle was made in Pittsylvania County from April 1 to September 23, 1939. The work was divided into field observations, rearing experiments end population studies. From field observations made throughout the season it was found that this insect fed …
-
Behavioral and Morphological Variation in Clover Mites From Different Host Plants
Made available in DSpace on 2014-12-05T21:34:01Z (GMT). No. of bitstreams: 1 6003998.pdf: 6093191 bytes, checksum: 37e14315402b813440e7c549b6d1cdd9 (MD5) Previous issue date: 1960
-
Behavioural and ecological interactions between Heliconius butterflies, their predators and host plants
… use leaf shape as a cue to approach their host plants, demonstrating the potential for Heliconius to drive negative frequency dependent selection on the leaf shape of their Passiflora host plants. Overall these results highlight ecological interactions between Heliconius butterflies, their …
-
Cross-Species Translocation of mRNA from Host Plants into the Parasitic Plant Dodder
Dodders (Cuscuta spp.) are parasitic plants that live by tapping into the vascular tissue of a host plant. Contents of the host phloem translocate readily into the parasite, and shared plasmodesmata have been documented between host cortical cells and dodder searching hyphae. Dodder is known to …
-
The influence of intraspecific variation in host plants on arthropod and fungal endophyte communities
… intraspecific genetic variation, particularly in plants, has received more attention, and has been linked to variation in plant-associated biotic assemblages and ecosystem function. However, in many cases, the phenotypic variation associated with influential genetic variation is unknown. In …
-
The role of chemicals in the location of host plants by midge pests of UK fruit crops
… tissue. Gravid females need to locate suitable host plant material on which to lay their eggs and there is good evidence that host-produced odour cues are involved. Gall midge pheromones are now available commercially; these attract males to allow monitoring in the field. However there are …
-
The complex foraging strategy of the specialised gallfly Urophora cardui (Diptera: Tephritidae) for host plants (Cirsium arvense, Asteraceae)
… insects in terrestrial ecosystems depend on plants for their survival and reproduction. They dominate terrestrial ecosystems due to species and individual abundance. Interactions between these two groups are thus of a high significance for the analysis and the understanding of complex …
-
Impact of host plants on the efficacy of nucleopolyhedrovirus as a biopesticide against insect pest Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)
The present study evaluated the effect of three host plants: chickpea, Cicer arietinum, tomato, Lycopersicon esculentum and cotton, Gossypium hirsutum, on the efficacy of Helicoverpa armigera nucleopolyhedrovirus (HearNPV). The results showed that HearNPV was inactivated within one hour when …
-
Integrating Above and Belowground Components of Biodiversity across Spatial Scales: The Role of Host Plants in the Distribution of Arbuscular Mycorrhizal Fungi
… absorbs nutrients that are transferred to their host plant in exchange for a purely phytogenic carbon supply. Due to their ubiquity and their functional importance, they are the subject of much research into their community ecology, yet much is still unknown. For instance: whether or not AM fungi …
-
Exploring Chemically Mediated Interactions Between Spotted Lanternfly, Lycorma delicatula, and Its Host Plants in the Mid-Atlantic Region of the United States
… (Ailanthus altissima), a preferred host from which L. delicatula sequesters quassinoids for chemical defense. Yet how volatile semiochemicals and sequestration dynamics shape behavior and inform management remains unresolved. This dissertation integrates behavioral ecology, …
-
ΣΥΜΒΟΛΗ ΣΤΗΝ ΕΡΕΥΝΑ ΤΗΣ ΜΥΚΗΤΟΧΛΩΡΙΔΑΣ ΤΗΣ ΝΗΣΟΥ ΚΡΗΤΗΣ. ΤΑΞΙΝΟΜΙΚΗ ΚΑΙ ΧΛΩΡΙΔΙΚΗ ΜΕΛΕΤΗ ΤΩΝ UREDINALES
… MORPHOLOGICAL STUDY OF THE RUST FUNGI ATTACKINGHOSTS OF THE COMPOSITAE WITH THE LIGHT MICROSCOPE AS WELL AS WITH THE SCANNING ELECTRON MICROSCOPE HAS FAVORED THE SEGREGATION OF CERTAIN TAXA FROM THE "COMPOUND SPECIES". IN ADDITION, SEVERAL TAXONOMIC PROBLEMS ON RUST FUNGI ATTACKING HOST PLANTS …
-
Noise and signal transmission properties as agents of selection in the vibrational communication environment
… species complex (Hemiptera: Membracidae) are host-specific phytophagous insects that communicate by sending vibrations through their host plants. Successful communication depends on the prevailing ecological and environmental conditions, which can affect communication behavior and the …
-
The Role of Visual and Olfactory Cues in Host Recognition for the Specialist Bee Genus Diadasia, and Implications for the Evolution of Host Choice
How specialist bees distinguish their host plants from co-blooming non-hosts is not well understood, but it is thought that they may be physiologically limited in their ability to recognize the majority of visual and olfactory cues presented by flowering plants. Species in the genus Diadasia …
-
Parallel and Nonparallel Patterns of Genetic Co-Differentiation: Evidence for Host Associated Differentiation Among Trophic Levels of the Oak Gall Wasp System
… life cycles are intimately related to their host plants can express host-associated differentiation (HAD) in the form of genetic divergence and/or RI isolation across alternative host plants. In this work, we ask if HAD cascades to higher trophic levels in parasitoids of an insect herbivore …
-
Studies of the mechanisms involved in host finding and mating behaviour of the African coffee white stem borer, Monochamus leuconotus (pascoe) (Cleoptera: Cerambycidae)
… interactions between conspecific beetles and host plants. Mating behaviour and daily activity patterns of adult M. leuconotus were characterised under laboratory and semifield conditions. Mating was initiated after the male encountered a searching female and touched her with antennae or tarsi. …
-
Feeding determinants in aphids with special reference to the Rose Aphid Macrosiphum rosae (L.) / by Zhongkui Peng.
… leaf surface chemicals in the discrimination of host plants and the deterrent effect of catechin and its oxidative condensation products.
-
The investigation of kairomones and photosensitizers affecting Liriomyza bryoniae (Diptera, Agromyzidae) /
… leafminers locate and recognize the suitable host-plants by plant-emitted volatiles, such plant-origin compounds (kairomones) could be used for insects’ attraction to the bait with photosensitizer. The aim of the study was to determine kairomones emitted by tomato leafminer L. bryoniae …
-
Preference and Performance of the Water Lily Aphid (Rhopalosiphum Nymphaeae) among Native and Invasive Duckweeds (Lemnaceae)
… species of insect that feed on a variety of host plants including members of the Lemnaceae family. Many studies have focused on the relationship between herbivore preference and performance on different host plants, and as such the goal of this study was to determine if there is any …
Page 1 of 8