herbicide trials in the snail habitats of the egypt 49 project.the molluscan hosts of schistosoma haematobium, schistosoma mansoni and fasciola spp. have been found to flourish in association with certain submersed, floating and emergent weeds in the irrigation system of the egypt 49 project area. the efficacy of acrolein in killing potamogeton crispus, an important submersed weed, has been previously established. the present paper deals with field trials of different herbicides, alone or combined, against the other predominant types of floating and emergen ...196514310915
a leaf spot disease of panicum repens, incited by a phycomycetous parasite. 195114941016
acidocella aluminiidurans sp. nov., an aluminium-tolerant bacterium isolated from panicum repens grown in a highly acidic swamp in actual acid sulfate soil area of aluminium-tolerant bacterium, strain al46(t), was isolated from a waterweed, panicum repens, grown in a highly acidic swamp (ph 3) at an actual acid sulfate soil area of vietnam. cells were gram-negative, aerobic, non-spore-forming, non-motile rods (0.3 microm wide and 1.2-1.6 microm long). 16s rrna gene sequence analysis indicated that strain al46(t) belongs to the genus acidocella, class alphaproteobacteria. strain al46(t) was related most closely to the type strains of acidocella facilis a ...201019656936
burkholderia bannensis sp. nov., an acidic ph-neutralizing bacterium isolated from torpedo grass (panicum repens) that grows in highly acidic swamps in thailand.two strains of acidic ph-neutralizing bacteria, e25(t) and e21, were isolated from torpedo grass (panicum repens) that grows in highly acidic swamps (ph 2 - 4) in actual acid sulfate soil areas of thailand. the strains were gram-negative, aerobic, non-spore-forming, and rod-shaped bacteria, having a cellular width of 0.6 - 0.8 microm and a length of 1.6 - 2.1 microm. these strains showed good growth between ph 4.0 and 8.0 and between 17 and 37 degrees c. the organisms contained ubiquinone q-8 as ...201020709915
origins of host-specific populations of the blast pathogen magnaporthe oryzae in crop domestication with subsequent expansion of pandemic clones on rice and weeds of rice.rice, as a widely and intensively cultivated crop, should be a target for parasite host shifts and a source for shifts to co-occurring weeds. magnaporthe oryzae, of the m. grisea species complex, is the most important fungal pathogen of rice, with a high degree of host specificity. on the basis of 10 loci from six of its seven linkage groups, 37 multilocus haplotypes among 497 isolates of m. oryzae from rice and other grasses were identified. phylogenetic relationships among isolates from rice ( ...200515802503
norflurazon and simazine removal from surface water using a constructed wetland.norflurazon and simazine are pre-emergent herbicides detected frequently in surface water associated with south florida agricultural canals and drainage water. this study investigated the potential use of a 1.34 ha constructed wetland for removing these herbicides from surface water. the total length of the wetland was 400 m and width was 35 m. a surface water flow rate of 740 l/min was maintained in the system using a pump. the plant community within the system consisted primarily of panicum re ...201121833732
interspecific differences in growth response and tolerance to the antibiotic sulfadiazine in ten clonal wetland plants in south china.pollution caused by residual antibiotics is a worldwide environmental issue. antibiotic residues often occur in aquatic ecosystems, posing threats to the health of aquatic organisms. the effects of antibiotic residues on the growth of crop plants and on human health are reasonably well known. however, less is known about antibiotic effects on wetland plants. therefore, we studied the response and tolerance of ten clonal wetland plants grown in soil spiked with sulfadiazine at 10 mg kg(-1) (an en ...201626580742
studies on claviceps parasitic on panicum species in india.panicum repens and p. antidotale were found to be infected with claviceps sp. this is the first report of ergot on p. repens. the pyrenomycete produced abundant sclerotia on the host plants. the sclerotia contained 0.71 and 0.68% alkaloids, respectively, which predominantly consisted of chanoclavine, festuclavine and agroclavine. the infected grasses were possibly mycotoxic. submerged cultures of claviceps strain isolated from panicum spp. produced significant amount of chanoclavine, festuclavin ...19827084822
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