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incidence of airborne aspergillus flavus spores in cornfields of five states.airborne aspergillus flavus spores were rarely detected throughout the 1975 growing season by the agar plate method at cornfield sites in georgia, illinois, maryland, south carolina, and virginia.1978416756
maternal diet and mental retardation in southern georgia, usa.the diet of each of 250 mothers was correlated with the i.q. (intelligence quotient) of her child. when the i.q. was above 90, no systematic relationship was observed. below an i.q. of 70, all mothers consumed a similar diet--one with a smaller amount and variety of fruits and vegetables, but larger amounts of yams, greens, corn, rice and dry legumes. this diet was uniquely deficient in none of the common nutrients. it seems more possible, therefore, that the correlation with diet could be due t ...19846526603
near infrared reflectance spectroscopic determination of protein nitrogen in plant tissue.a rapid, nondestructive method is described for the determination of protein nitrogen in plant tissue, using near infrared reflectance (nir) spectroscopy. procedures for instrument calibration are discussed. comparisons between kjeldahl nitrogen and nir nitrogen are made for corn leaf tissue from georgia and indiana. multiple correlation coefficients for other plant tissues such as peanuts, soybean, wheat, pecan, bermuda grass, and bent grass are also shown.19846746471
airborne aflatoxin in corn processing facilities in georgia.problems affecting the health of agricultural workers in processing facilities where grains are contaminated with aflatoxin have been noted previously. airborne particulates produced during processing are reported to produce various carcinomas when inhaled by factory workers. two corn processing plants within georgia were surveyed during the fall of 1984 and 1985 with utilization of an andersen 6-stage air sampler, a high-volume air sampler and a slit sampler. no airborne aflatoxin was found; ho ...19873578031
comparative evaluation of commercially available aflatoxin test methods.five qualitative methods and 1 quantitative aflatoxin analytical method were compared with the holaday-velasco (hv) minicolumn and thin-layer chromatography (tlc) methods for corn in an evaluation involving 4 u.s. department of agriculture federal grain inspection service (usda-fgis) laboratories, 1 laboratory at the university of georgia, and 1 laboratory at the university of arizona. samples analyzed included 1 set of artificially contaminated corn containing both aflatoxin b1 and b2 (ratio of ...19902211481
levels of fumonisin b1 in corn naturally contaminated with aflatoxins.aflatoxins and fumonisin b1 are hepatotoxic and carcinogenic metabolites produced by aspergillus flavus and fusarium moniliforme, respectively. these fungi are common natural contaminants of corn, and both aflatoxins and fumonisin b1 have been implicated as aetiological agents in animal and human diseases. to determine whether these mycotoxins co-exist on corn under natural conditions, 28 samples from the 1991 georgia (usa) corn crop were assayed for (total) aflatoxin and fumonisin b1. 27 sample ...19938282284
elemental signatures of human diets from the georgia bight.multielement analysis was performed on bone samples extracted from the femora of 39 adults from three mortuary sites (johns mound, santa catalina de guale, and santa catalina de guale de santa maria) and time periods (late preagricultural, early contact, and late contact) in the georgia bight. this study was used to investigate whether elemental analysis would support or contradict other lines of data regarding diets and dietary change previously generated for the region. the data are in agreeme ...19958599381
results of a nationwide survey to determine feedstuffs fed to lactating dairy cows.a nationwide survey to determine feedstuffs used in the diets of dairy cows was conducted. this survey was mailed to dairy nutritionists at universities in each state to describe the use of 144 feedstuffs. twenty-eight states responded and were grouped by region as follows: northeast (maine, maryland, new hampshire, new york, ohio, vermont, and west virginia), northwest (idaho, oregon, and washington), midwest (iowa, illinois, michigan, minnesota, missouri, nebraska, north dakota, south dakota, ...199910068966
aflatoxin levels in corn available as wild turkey feed in georgia.samples of corn available as wildlife feed from retailers throughout georgia (usa) were collected during april 1997 and analyzed for aflatoxin to determine if levels harmful to wild turkeys (meleagris gallopavo) were present. three of 31 (10%) samples collected from a 40-country area were positive. an enzyme-linked immunosorbent assay qualitatively determined that two samples contained from 0 to 20 ppb aflatoxin. a chromatography analysis of a third sample measured 380 ppb total aflatoxin. a sma ...200111504246
field performance of maize grown from fusarium verticillioides-inoculated seed.fusarium verticillioides is an important fungus occupying dual roles in the maize plant. the fungus functions as an endophyte, a fungal/host interaction beneficial to the growth of some plants. at other times, the fungus may function as a mycotoxin producing pathogen. the advantages and/or disadvantages of the endophytic relationship must be established in order to target appropriate sites for controlling diseases and mycotoxins in maize. one possibility could be to ensure seed maize is fungal f ...200515750733
fusarium species of the gibberella fujikuroi complex and fumonisin contamination of pearl millet and corn in georgia, usa.this study was designed to identify and compare the fusarium species of the gibberella fujikuroi complex on pearl millet (pennisetum glaucum (l.) r. br) and corn (zea mays l.) crops grown in southern georgia, and to determine their influence on potential fumonisin production. pearl millet and corn samples were collected in georgia in 1996, 1997 and 1998. three percent of the pearl millet seeds had fungi similar to the fusarium species of the g. fujikuroi species complex. one hundred and nineteen ...200515883726
a protective endophyte of maize: acremonium zeae antibiotics inhibitory to aspergillus flavus and fusarium verticillioides.the maize endophyte acremonium zeae is antagonistic to kernel rotting and mycotoxin producing fungi aspergillus flavus and fusarium verticillioides in cultural tests for antagonism, and interferes with a. flavus infection and aflatoxin contamination of preharvest maize kernels. chemical studies of an organic extract from maize kernel fermentations of acremonium zeae (nrrl 13540), which displayed significant antifungal activity against aspergillus flavus and f. verticillioides, revealed that the ...200516018316
new restriction fragment length polymorphisms in the cytochrome oxidase i gene facilitate host strain identification of fall armyworm (lepidoptera: noctuidae) populations in the southeastern united states.several restriction sites in the cytochrome oxidase i gene of fall armyworm, spodoptera frugiperda (j.e. smith), were identified by sequence analysis as potentially being specific to one of the two host strains. strain specificity was demonstrated for populations in florida, texas, mississippi, georgia, and north carolina, with an acii and saci site specific to the rice (oryjza spp.)-strain and a bsmi and hinfi site joining an already characterized mspi site as diagnostic of the corn (zea mays l ...200616813297
modeling the impact of alternative hosts on helicoverpa zea adaptation to bollgard cotton.for highly polyphagous cotton, gossypium hirsutum l., pests such as helicoverpa zea (boddie), a substantial portion of the larval population develops on noncotton alternative hosts. these noncotton hosts potentially provide a natural refuge for h. zea, thereby slowing the evolution of resistance to the bacillus thuringiensis berliner (bt)-derived cry1ac protein present in bollgard cotton. here, we demonstrate how the measured contribution of such alternative hosts can be included in estimating t ...200617195681
using haplotypes to monitor the migration of fall armyworm (lepidoptera: noctuidae) corn-strain populations from texas and florida.fall armyworm, spodoptera frugiperda (j. e. smith) (lepidoptera: noctuidae), infestations in most of north america north of mexico arise from annual migrations of populations that overwinter in southern texas and florida. a comparison of the cytochrome oxidase i haplotype profiles within the fall armyworm corn-strain, the subgroup that preferentially infests corn (zea mays l.) and sorghum (sorghum vulgare pers.), identified significant differences in the proportions of certain haplotypes between ...200818613574
crop juxtaposition affects cotton fiber quality in georgia farmscapes.phytophagous stink bugs (hemiptera: pentatomidae), including green stink bug [acrosternum hilare (say)], southern green stink bug [nezara viridula (l.)], and brown stink bug [euschistus servus (say)], have become a serious production issue for southeastern u.s. cotton, gossypium hirsutum l., growers. to investigate how different agronomic crops may affect stink bug damage and fiber quality in neighboring cotton fields, replicated 1.6-2.0-ha trials were planted with corn (zea mays l.), peanut (ar ...200919736764
composition and abundance of stink bugs (heteroptera: pentatomidae) in corn.the species composition and abundance of stink bugs (heteroptera: pentatomidae) in corn, zea mays l., was determined in this on-farm study in georgia. seven species of phytophagous stink bugs were found on corn with the predominant species being nezara viridula (l.) and euschistus servus (say). all developmental stages of these two pests were found, indicating they were developing on the corn crop. the remaining five species, oebalus pugnax pugnax (f.), euschistus quadrator (rolston), euschistu ...201022182541
parasitism and predation of stink bug (heteroptera: pentatomidae) eggs in georgia corn fields.nezara viridula l. and euschistus servus (say) are the predominant species of phytophagous stink bugs on corn, zea mays l., in georgia. oebalus pugnax pugnax (f.) occurs in relatively low numbers, and the predatory stink bug podisus maculiventris (say) is commonly found. limited information is available on natural biological control of these four stink bug species in georgia corn fields; therefore, a 6-yr study of parasitism and predation of their eggs was initiated in 2003. naturally occurring ...201022127170
spatial and temporal dynamics of stink bugs in southeastern farmscapes.a 3-yr study (2009-2011) was conducted to examine the spatial and temporal dynamics of stink bugs in three commercial farmscapes. study locations were replicated in south carolina and georgia, in an agriculturally diverse region known as the southeastern coastal plain. crops included wheat, triticum aestivum (l.), corn, zea mays (l.), soybean, glycine max (l.), cotton, gossypium hirsutum (l.), and peanut, arachis hypogaea (l.). farmscapes were sampled weekly using whole-plant examinations for co ...201525843577
efficacy of silk channel injections with insecticides for management of lepidoptera pests of sweet corn.the primary lepidoptera pests of sweet corn (zea mays l. convar. saccharata) in georgia are the corn earworm, helicoverpa zea (boddie), and the fall armyworm, spodoptera frugiperda (j. e. smith). management of these pests typically requires multiple insecticide applications from first silking until harvest, with commercial growers frequently spraying daily. this level of insecticide use presents problems for small growers, particularly for "pick-your-own" operations. injection of oil into the co ...201526470329
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