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Influence of growing location and cultivar on Rhyzopertha dominica （Coleoptera： Bostrichidae） and Sitophilus oryzae （Coleoptera： Curculionidae） infestation of rough rice

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Insect Science 2007年第3期14卷 231-239页

作者： FRANK H. ARTHUR RUSTY C. BAUTISTA TERRENCE J. SIEBENMORGEN USDA-ARS Grain Marketing and Production Research Center Manhattan Kansas Department of Food Science University of Arkansas Fayetteville Arkansas USA

Long-grain rice cultivars Cocodrie, Wells, and XP 723 grown in three locations （Hazen, MO; Essex and Newport, AR, USA）, and medium-grain rice cultivars Bengal and XP 713 grown in two locations （Jonesboro and Lodge Corner, AR, USA）, were harvested and assayed for susceptibility to Rhyzopertha dominica （F.）（Coleoptera： Bostrichidae）, the lesser grain borer, and Sitophilus oryzae （L.）（Coleoptera： Curculionidae）, the rice weevil, on rice held at 27℃, 57% and 75% relative humidity （RH）. Separate samples from the same harvest lots were also analyzed for the physical characteristics of brown rice yield, percentage whole kernels and kernel thickness. Progeny production and feeding damage of R. dominica were significantly different among long-grain cultivars within two of the three locations （P 〈 0.05）, but not for location or RH （P ≥ 0.05）, while progeny production of S. oryzae was different among cultivars, location, and RH （P 〈 0.05）. On medium-grain rice, both cultivar and location were significant for progeny production of R. dominica, but not RH, while cultivar and RH were significant for progeny production of S. oryzae, but not location. On both rice types, feeding damage of R. dominica followed the same trends and was always strongly positively correlated with progeny production （P 〈 0.05）, but for S. oryzae there were several instances in which progeny production was not correlated with feeding damage （P ≥ 0.05）. Physical characteristics of both rice types were statistically significant （P 〈 0.01） but actual numerical differences were extremely small, and were generally not correlated with progeny production of either species. Results indicate that the location in which a particular rice cultivar is grown, along with its characteristics, could affect susceptibility of the rice to R. dominica and S. oryzae.

关键词： rough rice cultivars stored-product insects Rhyzopertha dominica Sitophilus oryzae

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Dimensionless variable groups for the free-fall grain dryer

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International Journal of Agricultural and Biological Engineering 2019年第4期12卷 197-204页

作者： Supitchar Meesukchaosumran Tawit Chitsomboon School of Mechanical Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand

Dimensionless variable groups(DGs)of free-fall grain dryer were developed by using the characteristic scaling method and engineering *** DGs were intended for the analyses of drying characteristics and sizes of this *** of the free-fall rough rice dryer were carried out using different drying chambers(small and medium scales),drying air temperatures(100°C-150°C),and drying air speeds(1-3 m/s).Experimental data were used to study relationships and to validate similarities among these *** results of the study showed the five appropriate dimensionless variables representing and describing the drying mechanism of the free-fall *** DGs could be applied to design and analyze scaling up the *** addition,the dimensionless correlation was established to predict the moisture contents of rough rice while being dried by the free-fall *** predicted values from this correlation were in relatively good agreement with the experimental data under the proposed drying conditions(R2=0.989,MRD=1.82%and RMSE=0.0168).

关键词： dimensionless variable similarity free-fall dryer rough rice

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