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Molecular Identification Of Oomycete Species Associated With Woody Plants In Louisiana And Survey Of Oomycete Species Associated With Live Oak Trees Planted On The Louisiana State University Campus, Hamilton Crockett
LSU Master's Theses
Three Oomycetes genera, Phytophthora, Phytopythium and Pythium, contain many important plant pathogens. Historically, Phytophthora infestans, responsible for the great Irish potato famine, and Phytophthora ramorum, causal agent of sudden oak death disease, are the two better-known high impact pathogens. The LSU AgCenter Plant Diagnostic Center (PDC) has been isolating putative Phytophthora and related species from combined root and soil samples collected from various woody ornamentals and trees for over a decade. In August of 2016, Louisiana received torrential rains, which resulted in historic flooding in several southern parishes. During subsequent years, the PDC staff isolated a …
Evaluation Of Bell Pepper Cultivars With And Without Resistance To Bacterial Leaf Spot And Phytophthora, West Central Minnesota, Nathan Dalman, Steve Poppe
Evaluation Of Bell Pepper Cultivars With And Without Resistance To Bacterial Leaf Spot And Phytophthora, West Central Minnesota, Nathan Dalman, Steve Poppe
Midwest Vegetable Trial Reports
Bacterial leaf spot (BLS) and Phytophthora (PHY) diseases are a common problem for Minnesota bell pepper producers and if not detected and treated early enough, these diseases can kill the plants. There are cultivars that have resistance to these particular diseases but these cultivars must maintain yields similar to traditional cultivars in order to be desired by producers and buyers. Our goal was to determine any differences in performance between cultivars with and without resistance. Yield, fruit size and number of fruit per plant were the evaluated characteristics.
Evaluation Of Fungicides And Biofungicide To Control Phytophthora Root Rot (Phytophthora Cinnamomi Rands) And Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae) On Flowering Dogwoods Exposed To Simulated Flood Events, Matthew S. Brown, Fulya Baysal-Gurel, Jason B. Oliver, Karla M. Addesso
Evaluation Of Fungicides And Biofungicide To Control Phytophthora Root Rot (Phytophthora Cinnamomi Rands) And Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae) On Flowering Dogwoods Exposed To Simulated Flood Events, Matthew S. Brown, Fulya Baysal-Gurel, Jason B. Oliver, Karla M. Addesso
Agricultural and Environmental Sciences Faculty Research
Phytophthora root rot causes major economic losses in woody ornamental nurseries, especially in plants exposed to flooding. Ambrosia beetles, which attack stressed trees, are also important pests of woody plants. In this study, several products were evaluated for control of Phytophthora root rot and ambrosia beetles on containerized flowering dogwoods (Cornus florida L.) exposed to simulated flood events under field conditions. In two trials, preventive (7 days preflooding) or curative (1 day postflooding) sprench (combination spray and drench) treatments were applied to containerized dogwoods artificially inoculated with Phytophthora cinnamomi Rands. The plants were flooded by maintaining standing water for 1, …
Interaction Of A Preventative Fungicide Treatment And Root Rot Pathogen On Ambrosia Beetle Attacks During A Simulated Flood Event, Karla Addesso, Fulya Baysal-Gurel, Jason Oliver, Christopher Ranger, Paul O'Neal
Interaction Of A Preventative Fungicide Treatment And Root Rot Pathogen On Ambrosia Beetle Attacks During A Simulated Flood Event, Karla Addesso, Fulya Baysal-Gurel, Jason Oliver, Christopher Ranger, Paul O'Neal
Agricultural and Environmental Sciences Faculty Research
Flooding can increase tree susceptibility to root rot pathogens as well as attacks by ambrosia beetles attracted to stress-induced ethanol emissions. The objective of this study was to investigate the interaction of a preventative fungicide treatment and root infection with Phytophthora cinnamomi on ambrosia beetle attacks in flood stressed trees. A fungicide (Pageant® Intrinsic®) was evaluated in two flood trials using Eastern redbud and tulip poplar trees with treatments including the fungicide with or without pathogen or no fungicide with or without pathogen. Fungicide treated trees had fewer ambrosia beetle attacks, particularly in trees without P. cinnamomi co-infection. In a …
Brown Collar Rot Of Citrus, Department Of Agriculture, Western Australia
Brown Collar Rot Of Citrus, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
Infection of fruit and foliage by brown rot fungi (Phytophthora spp.) occurs after opening rains in autumn. It can continue during periods of wet weather until spring.