Madison, AL, United States
Madison, AL, United States

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Moore S.R.,Auburn University | Lawrence K.S.,Auburn University | Arriaga F.J.,U.S. Department of Agriculture | Burmester C.H.,Alabama Cooperative Extension System | Van Santen E.,Auburn University
Journal of Nematology | Year: 2010

Rotylenchulus reniformis is the most damaging nematode pathogen of cotton in Alabama. It is easily introduced into cotton fields via contaminated equipment and, when present, is difficult and costly to control. A trial to monitor the natural migration of R. reniformis from an initial point of origin was established in 2007 and studied over two growing seasons in both irrigated and nonirrigated no-till cotton production systems. Vermiform females, juveniles and males reached a horizontal distance of 200 cm from the initial inoculation point, and a depth of 91 cm in the first season in both systems. Irrigation had no effect on the migration of vermiform females and juveniles, but males migrated faster in the irrigated trial than in the non-irrigated trial. Population density increased steadily in the irrigated trial during both years, exceeding the economic threshold of 1,000 per 150 cm , but was highly correlated with rainfall in the non-irrigated trial. The average speed of migration ranged from 0- to 3.3-cm per day over 150 days. R. reniformis was able to establish in both the irrigated and non-irrigated trials in one season and to increase population density significantly. © The Society of Nematologists 2010.

Moore S.R.,Auburn University | Lawrence K.S.,Auburn University | Arriaga F.J.,U.S. Department of Agriculture | Burmester C.H.,Alabama Cooperative Extension System | Van Santen E.,Auburn University
Nematropica | Year: 2011

The presence of Rotylenchulus reniformis below the plow layer can have negative effects on cotton production by restricting the uptake of water and nutrients by roots in the lower soil horizons. Two trials were established in 7.62-cm diameter by 75-cm deep soil cores to determine 1) the effect of water movement on vertical translocation of R. reniformis, and 2) the role of root growth in the downward migration of R. reniformis. The water movement study consisted of three treatments of simulated rainfall amounts, 25-mm, 76-mm, and 127-mm, and no rainfall. Water movement minimally affected the movement of R. reniformis through the soil profile. Nematodes were observed to a depth of 30-cm after the 25-mm rain event. Rotylenchulus reniformis was detected to a depth of 45-cm following 76-mm of rainfall and to the maximum sampling depth of 75-cm following 127-mm of rainfall. Cotton roots reached the maximum depth of 75-cm at 60 days after planting (DAP). Vermiform life stages reached 75-cm at 45 DAP. Females colonized roots to a depth of 62-cm at 90 DAP. Cotton roots were observed to exhibit less growth when the numbers of females embedded in the roots was the highest.

Boetel M.A.,North Dakota State University | Majumdar A.,Alabama Cooperative Extension System | Jaronski S.T.,U.S. Department of Agriculture | Horsley R.D.,North Dakota State University
Biocontrol Science and Technology | Year: 2012

The sugarbeet root maggot, Tetanops myopaeformis (Röder), is a major North American pest of sugarbeet, Beta vulgaris L. Previous research suggests that moderate T. myopaeformis control is possible with the entomopathogen Metarhizium anisopliae (Metch.) Sorok. We conducted a three-year (2002-2004) experiment to assess impacts of oat, Avena sativa L. and rye, Secale cereale L., cover crops on persistence of corn grit-based granular or spray formulations of M. anisopliae isolate ATCC 62176 (i.e. MA 1200) applied at 8×1012 viable conidia/ha in sugarbeet. More colony forming units (CFUs) were detected immediately after application [0 days after treatment (DAT)] in spray plots than granule-treated plots. However, 76-92% declines in CFUs per gram of soil occurred in spray plots within 30 DAT. Substantially (i.e. 83-560%) more rainfall occurred in June 2002 than during June of any other year. Subsequently, 71-670% increases in CFU concentrations occurred by 60 DAT in M. anisopliae granule-treated plots with oat or rye cover crops that year. CFU density increases were higher in cover crops in 2002, but no significant cover crop effects were detected. Conidia persisted for up to 30 DAT in M. anisopliae spray plots and 60 DAT in granule-treated plots in 2002; however, no increases occurred in the years with less June rainfall. Trends suggest that M. anisopliae aqueous sprays result in greater conidia concentrations than granules at sugarbeet plant bases in June during T. myopaeformis oviposition and larval establishment on host plants. Increases are possible when delivering conidia via granules, but high post-application rainfall could be necessary for conidia production. © 2012 Copyright Taylor and Francis Group, LLC.

Kim K.,Auburn University | Struempler B.J.,Auburn University | Parmer S.M.,Alabama Cooperative Extension System
Journal of Hunger and Environmental Nutrition | Year: 2011

The purpose of this study was to empirically test the antecedents of behavioral intention in vegetable consumption behavior among Supplemental Nutrition Assistance Program (SNAP) recipients based on the theory of planned behavior and to find a strategy to boost vegetable consumption. Two hundred and eighty-seven participants were recruited and interviewed by telephone, and 176 completed the survey questionnaire. In contrast to the conventional theory of planned behavior, the results of this study showed that attitude, subjective norms, and perceived behavioral control did not predict intention to eat more vegetables, but attitude, intention, and perceived behavioral control predicted the behavior of consuming vegetables. The findings of this study suggest that intervention by vegetable recipe cards had a significant influence on SNAP recipients' desires to eat more vegetables. © Taylor & Francis Group, LLC.

Hill J.I.,Auburn University | Nelson R.G.,Auburn University | Woods K.L.,Alabama Cooperative Extension System | Weese J.O.,Auburn University | Whitis G.N.,Alabama Cooperative Extension System
Aquaculture Economics and Management | Year: 2013

Marketed as the "nugget" in the seafood trade, the belly flap of the catfish (Ictalurus punctatus) is a residual portion with minimal value due to its elevated fat content and unsightly black peritoneal membrane. To ameliorate these shortcomings, a variety of marinated and breaded nugget formulations were developed and screened in the laboratory. Four of these were evaluated further for organoleptic traits using consumer sensory panels. Next, an in-store conjoint survey was conducted in 13 supermarkets in eight cities in the southern United States to elicit consumers' preferences for price ($3.28/kg, $10.12/kg, $16.51/kg), color of breading (light, medium, dark), cooking method (fried, baked), and country of origin (United States, China). Cluster analysis suggested three consumer segments: a price-sensitive segment, a U.S.-origin segment, and a dark-breading segment. Membership in the segments was related to age, ethnicity, and education. Unusually strong preferences for higher prices and country of origin were investigated in detail. © 2013 Copyright Taylor and Francis Group, LLC.

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