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 22 for “"Cucurbits"”.
-
Non-chemical methods for managing bacterial spot of cucurbits caused by Xanthomonas cucurbitae
… is an emerging and important disease of cucurbits worldwide. Studies were conducted to evaluate the effectiveness of biocontrol agents for managing bacterial spot, screen cucurbit cultivars and accessions for resistance to X. cucurbitae, and evaluate the pathogen's survival on plant …
-
Effectiveness of mustard short-cycle cover crops for management of Phytophthora capsici and Fusarium spp. in cucurbits
… of Phytophthora capsici and Fusarium spp. in cucurbits. To accomplish this goal laboratory, greenhouse, and field studies were conducted during 2008-2010. In the laboratory studies, mustard extracts were tested for inhibition of colony growth, sporangia production, zoospore germination, and …
-
Characterization of Effector Genes in Acidovorax citrulli the Causing Agent of Bacteria Fruit Blotch Disease of Cucurbits
Bacterial fruit blotch (BFB) of cucurbits is caused by Acidovorax citrulli, a Gram-negative seedborne bacterium that can cause up to 100% fruit yield losses in the field. Currently, BFB is a major problem for the cucurbits industry worldwide. Thus far, attempts to identify resistance in cucurbit …
-
Detection of Acidovorax citrulli, the Causal Agent of Bacterial Fruit Blotch Disease of Cucurbits, Prevention via Seed Treatments and Disease Resistance Genes
… Bacterial fruit blotch (BFB) disease of cucurbits is an economically devastating plant disease that has caused an estimated loss of up to $450M on watermelon crops and $75M (worldwide) to the seed and transplant industries since 1996. Disease symptoms include water-soaked cotyledons, leaf …
-
Identification of fungal species causing powdery mildew on cucurbits, determination of the genetic and pathogenic variations of the fungi and their sensitivity to major powdery mildew fungicides
… mildew is an annually-occurring disease of cucurbits, which causes yield losses up to 50% in Illinois and worldwide. Podosphaera xanthii and Golovinomyces cichoracearum are known as the causal agents of cucurbit powdery mildew. No reported investigations have been conducted on the species …
-
Dissection of phloem transport in cucurbitaceae by metabolomic analysis
… phloem. Most studies of phloem physiology using cucurbits have neglected the possible functions of vascular architecture in phloem transport. It is well known that there are two phloem systems in cucurbits with distinctly different anatomical features: central phloem and extrafascicular phloem. …
-
An Assessment of Non-Apis Bees as Fruit and Vegetable Crop Pollinators in Southwest Virginia
… crops (apple, blueberry, caneberry, and cucurbits); diverse bee populations may be helping to stabilize pollination service (105 species on crop flowers); landscape factors were better predictors of non-Apis crop pollination service than farm management factors or overall bee diversity; …
-
The Use of Buckwheat Border Habitats to Attract Natural Enemies of Cucumber Beetles in a Cucurbit Agroecosystem
… Coleoptera: Chrysomelidae) two major pests of cucurbits, was assessed in a cucurbit agroecosystem by using buckwheat (Fagopyrum esculentum Moench) border habitat to attract the natural enemies, Celatoria diabroticae (Shimer) and Celatoria setosa (Coquillett) (both Diptera: Tachinidae) and …
-
TRACKING PLANT VIRUS INFECTIONS THROUGH MULTIPLE DIMENSIONS: A SEARCH FOR SOURCES OF NONPERSISTENT VIRUS VECTORS AND RESERVOIRS AT LOCAL AND REGIONAL SCALES
… ecology of aphid-vectored viruses in Midwestern cucurbits; in particular, it focuses on identifying source populations of vectors and virus reservoirs within fields and interactions of vector aphids with land cover surrounding and within fields. Initially, I identified the most commonly occurring …
-
Linking Semiochemical Ecology and Spatial Dynamics to Improve Integrated Pest Management of Striped Cucumber Beetle, Acalymma vittatum
… (Fabr.), is a major early-season pest of cucurbits in eastern North America because overwintering adults injure seedlings while they are young and highly vulnerable to feeding damage or infection by Erwinia tracheiphila, the causal agent of bacterial wilt. This early vulnerability makes it …
-
Programmed cell death, aerenchyma and pith cavity formation in vitro of Luffa cylindrica (L.) M. Roem.: an anatomical and physiological approach
… it works. Therefore, in this work, we present cucurbits of the genus Luffa as potential models for studies involving programmed cell death and analyze the formation of lysigenous aerenchyma and the pith cavity in Luffa cylindrica over days and in different concentrations of agar (w/v) of agar …
-
Functional and ecological investigations in Cucurbita: factors mediating fruit infections and insect interactions
Bacterial spot disease of cucurbits, caused by Xanthomonas cucurbitae, poses a significant threat to pumpkin production. This study aimed to investigate the role of the exocellulase gene cbhA in disease development by comparing a wildtype IL 234 4R isolate to a ΔcbhA mutant in greenhouse fruit …
-
Determining the characteristics of Xanthomonas cucurbitae bacterium from the North Central Region and developing effective seed treatment for eradication of the bacterium in pumpkin seeds
Bacterial spot of cucurbits, caused by Xanthomonas cucurbitae, has become a serious threat to pumpkin production in Illinois and other states in the North Central Region (NCR) of the United States. This study was conducted to investigate the characteristics of X. cucurbitae isolates from the NCR …
-
NOVEL PERSPECTIVES IN THE CONTROL OF PLANT PATHOGENIC OOMYCETES
… as potato late blight, blight and fruit rot of cucurbits, Phytium root rot and grapevine downy mildew. Out of the 77 compounds tested, two promising molecules showed a consistently high efficacy and were characterized for their antimicrobial activity and mode of action. Overall, this research …
-
Genomic characterizations of Xanthomonas cucurbitae and using comparative genomics to predict novel microbe-associated molecular patterns in Xanthomonas
… as the causal agent of bacterial spot on cucurbits, no genomic-level analyses have been carried out regarding the pathogen. Using the first reference quality X. cucurbitae genome assembly, an RNA-seq analysis was carried out to assess virulence characteristics of the pathogen. By analyzing …
-
The Effects of Insecticides on Squash Bug, its Egg Parasitoids and Pollinators in Virginia Cucurbit Production
… parasitoid, and pollinators in the production of cucurbits in Virginia. Plants in the cucumber family are dependent on insect pollination for successful fruit set, and are also susceptible to plant eating insects. Squash bugs are capable of transmitting cucurbit yellow vine decline, and their …
-
Intercropping for food, fiber, and fuel on pine plantations in Virginia and North Carolina
… Crops: Tobacco, Peanuts, Snap Beans, Tomatoes, Cucurbits, 3. Forage Crops: Grasses and Legumes, 4. Biomass Crops: sycamore, Sweet Gum, European Black Alder, Cottonwood. The ecological and management characteristics of these crops were examined to determine their compatibility with pine …
-
Laboratory and field evaluation of efficacy of potential fungicides for managing phytophthora blight (Phytophthora capsici) of processing pumpkin (Cucurbita moschata)
Phytophthora blight, caused by the oomycete Phytophthora capsici Leonian, is a destructive disease that severely limits the production of processing pumpkin (Cucurbita moschata Duchesne). This study was conducted to evaluate the efficacy of the potential eight fungicides or their combinations …
-
Virus-induced effects on aphid-host interactions in Solanaceous plants
… In Arabidopsis thaliana ecotype Col-0 and cucurbits, CMV diminishes host suitability for aphids, inhibiting prolonged feeding and encouraging migration of viruliferous aphids from infected plants to healthy plants. In tomato (Solanum lycopersicum), a model species and economically important …
-
Characterization of Novel Type VI Effectors of Acidovorax citrulli and Their Applicability to Biological Control of Plant Diseases
… in devastating decrease in yields of important cucurbits including watermelon, melon, squash and cucumber. Our inter-microbial competition assays demonstrate that AAC00-1 contains an active T6SS and presents a dramatic antimicrobial activity against a variety of microbes, including Gram-negative …
Page 1 of 2