scholarly journals Evaluation of Selected Insecticides For Rice Water Weevil Control, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 293-294
Author(s):  
M.A. Muegge ◽  
J.D. Barbour ◽  
W.C. Rice ◽  
P.A. Bollich
Keyword(s):  
Treatment Effect ◽  
Research Station ◽  
Rice Water Weevil ◽  
Wire Screen ◽  
Appropriate Treatment ◽  
Mesh Screen ◽  
Significant Difference ◽  
Error Terms ◽  
Rice Water

Abstract Several insecticides applied at various rates, formulations, and times were evaluated for control of adult rice water weevil at the Rice Research Station, Crowley, LA. Plots, 5 X 25 ft, were arranged in a RB design with 4 blocks and 11 treatments with sub-sample nesting within the block X treatment effect. Fertilizer was pre-plant incorporated at 45 lb (23-12-12) N-P-K/acre and applied broadcast 4 and 6 wk post-flood at 45 lb (23-12-12) and 55 lb (21-0-0) N-P-K/acre respectively. Plots were drill-seeded with ‘Cyprus’ rice at 90 lb of seed/acre to Crowley silt loam on 2 May, flushed on 21 May and permanently flooded 28 May. The her-bicides Basagran, Stam, Arrosolo, and Ordram were applied to control weeds. Basagran and Stam were applied at 0.5 and 4.0 lb(AI)/acre on 27 May. Arrosolo and Ordram were applied aerially at 3.5 lb(AI)/acre on 4 Jun and 3.0 lb(AI)/acre on 11 Jun, respectively. All pesticide applications except Furadan 3G were made using a CO2 backpack sprayer delivering 15 gpa at 28 psi with 110015VS flat-fan nozzles on a 3 ft boom. Three randomly selected soil samples per plot were taken 11,18 and 26 Jun using a 4 X 4 inch core sampler. Individual samples were washed through a funnel, fitted with wire screen, into a 35 mesh screen sieve. Collected rice water weevil (RWW) larvae and pupae were floated in a saturated NaCl solution, and counted. Plots were harvested on 11 Sep using a Kubota combine. Moisture content of harvested grain was determined and standardized to 12% moisture for determination of yield. Rice water weevil larval data were log transformed to improve normality before being subjected to analysis of variance. The experimental and sam-pling error terms for the RWW larval data were tested for homogeneity of variances, and pooled error terms were used to test the treatment effect when appropriate. Treatment means were separated using protected least significant difference (LSD) at P = 0.05.

scholarly journals Evaluation of Dimilin for Rice Water Weevil Control, 1995

1998 ◽  
Vol 23 (1) ◽  
pp. 261-262
Author(s):  
M. A. Muegge ◽  
J. D. Barbour ◽  
W. C. Rice ◽  
P. A. Bollich
Keyword(s):  
Treatment Effect ◽  
Rice Yield ◽  
Sampling Error ◽  
Research Station ◽  
Rice Water Weevil ◽  
Wire Screen ◽  
Rough Rice ◽  
Significant Difference ◽  
Error Terms ◽  
Rice Water

Abstract Dimilin was evaluated for control of adult rice water weevil at the Rice Research Station, Crowley, LA. Collectively levied plots, 5 X 20 ft, were arranged in a RBD with 4 blocks and 5 treatments with sub-sample nesting within the block X treatment effect. Fertilizer was incorporated pre-plant and applied broadcast 3 wk post-flood at 90 lb (13-13-13) and 50 lb (21-0-0) N-P-K/acre respectively. Plots were water seeded 29 May with pre-soaked ‘Cyprus’ rice at 138 lb seed/acre to Crowley silt loam and permanently flooded 8 Jun. Foliar applications of Dimilin 25 W were made at 0.25 or 0.125 lb (AI)/acre. Furadan 3 G was applied at RWW threshold (5 larvae/sample) at 0.6 lb (AI)/acre using a hand-held shaker. Dimilin 25 W applications were made using a CO2 backpack sprayer delivering 15 gpa at 16 psi with 80015VS flat-fan spray nozzles on a 3 ft boom. Rice water weevil eggs were counted from 5 randomly selected plants per plot beginning 2 d after flood then weekly until RWW threshold. Three randomly selected soil samples per plot were taken 26 Jun, 3 and 11 Jul using a 4 X 4 in core sampler. Individual samples were washed through a funnel, fitted with wire screen, into a 35-mesh screen sieve. Collected RWW larvae and pupae were floated in a saturated NaCl solution, and counted. Rough rice yield (lb/acre) was determined by hand-harvesting one random 3-ft2 sample per plot on 19 Sep. Moisture content of harvested grain was determined and standardized to 12% for determination of rough rice yield. RWW larval data were log transformed to improve normality. All data were subjected to ANOVA. Experimental and sampling error terms for the RWW larval data were tested for homogeneity of variances, and pooled error terms were used to test the treatment effect when appropriate. Protected least significant difference (LSD) was used for treatment mean separation.

scholarly journals Evaluation of Furadan and Payload for Rice Water Weevil Control, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 257-257
Author(s):  
M. A. Muegge ◽  
J. D. Barbour ◽  
G. B. Trahan ◽  
P. A. Bollich
Keyword(s):  
Row Spacing ◽  
Research Station ◽  
Silt Loam ◽  
Orthogonal Contrasts ◽  
Rice Water Weevil ◽  
Wire Screen ◽  
Pesticide Treatment ◽  
Mesh Screen ◽  
Application Date ◽  
Rice Water

Abstract Furadan and Payload were evaluated for control of rice water weevil at the Rice Research Station, Crowley, LA. Plots, 1.22 × 7.5 m, were individually leveed and arranged in a RCBD with 4 replicates and 4 treatments. Fertilizer was incorporated pre-plant and applied broadcast 3 wk post-flood at 50.6 kg (13-13-13) and 101.2 kg (21-0-0) N-P-K/ha respectively. Plots were drill seeded (17.5 cm row spacing) to Crowley silt loam with ‘Cyprus’ rice at 112.5 kg seed/ha on 12 May, flush irrigated 14 and 21 May, and permanently flooded 28 May. Propanil was applied at 3.34 kg/ha on 26 May using a CO2 backpack sprayer delivering 141.9 liters/ha at 1.8 kg/cm2 for weed control. Benomyl was aerially applied at 0.56 kg/ha on 28 Jun to control rice blast. Furadan 3G was applied 15 d post-flood using a hand-held shaker. Payload 15G was applied 15 d post-flood and at 2.95 kg/ha 15 and 29 d post-flood. Two randomly selected soil samples per plot were taken every 7 d starting 9 Jun and ending 21 Jul using a 10.2 × 10.2 cm core sampler. Individual samples were washed through a funnel, fitted with wire screen, into a 35 mesh screen sieve. Collected RWW larvae and pupae were floated in a saturated NaCl solution, counted and corrected for the number of rice plants per core. Effects of pesticide treatment on numbers of immature RWW were determined by ANOVA using orthogonal contrasts to separate the following mean comparisons: 1) Untreated vs Treated; 2) Furadan 3G vs Payload 15G applied once at 5.9 kg/ha and Payload applied twice a 2.95 kg/ha/application date; (3) Payload 15G applied once at 5.9 kg/ha vs Payload applied twice at 2.95 kg/ha/application. Because no significant differences in larva numbers were found among the Payload treatments, these were pooled and the following contrasts made: 1) Untreated vs Treated; 2) Furadan 3G vs Payload 15G. Analysis was performed using larval counts corrected and uncorrected for the number of plants per core, since these analyses produced similar results, only uncorrected means are presented in the table. All analyses were conducted at the 0.05 probability level.

scholarly journals Control of Rice Water Weevil with Dimilin, 1996A

1997 ◽  
Vol 22 (1) ◽  
pp. 288-288
Author(s):  
J. L. Bernhardt
Keyword(s):  
Experimental Design ◽  
Weed Control ◽  
Salt Water ◽  
Plant Roots ◽  
Silt Loam ◽  
Soil Cores ◽  
Plot Size ◽  
Rice Water Weevil ◽  
Mesh Screen ◽  
Rice Water

Abstract The experimental design was a RCB with 4 replications. Plot size was 9 rows (7 inch spacing) by 20 ft. Each plot was bound by levees. Rice was drill-seeded in Crowley silt loam at 90 lb/acre on 3 May and emerged on 12 May. Propanil and Bolero at 4 and 2 lb (AI)/acre, respectively, were applied for weed control on 29 May. Nitrogen was applied in a 3-way split of 75 lb N/acre as urea on 12 Jun and 30 lb N/acre on 5 and 14 Jul. Permanent flood was established on 12 Jun. All treatments of Dimilin were made with a CO2-pressurized back-pack sprayer at 18 gpa. Furadan 3G was applied 10 d after permanent flood with a hand-shaker. On 3 and 5 Jul and on 9 and 10 Jul five 4X4 inch (diam by depth) soil cores with an average of 5 plants/core were removed from plots. Soil was washed from the plant roots into a 40-mesh screen. The screen was immersed in salt water and RWW immatures were removed. Plots were harvested with a small combine on 13 Sept. Reported yields were adjusted to 12% moisture. Data were analyzed with ANOVA and LSD.

Rice Water Weevil (Coleoptera: Curculionidae) Population Dynamics in Louisiana

2004 ◽  
Vol 39 (4) ◽  
pp. 623-642 ◽  
Author(s):  
Hanwu Shang ◽  
Michael J. Stout ◽  
Zhitao Zhang ◽  
Jiaan Cheng
Keyword(s):  
Population Dynamics ◽  
Growing Season ◽  
Research Station ◽  
Light Traps ◽  
Lissorhoptrus Oryzophilus ◽  
Ratoon Crop ◽  
Rice Water Weevil ◽  
Louisiana State University ◽  
Flight Muscles ◽  
Rice Water

The rice water weevil, Lissorhoptrus oryzophilus Kuschel, has long been an important pest of rice in the U.S. and has recently emerged as a pest of rice in Asia. A systematic study of the life history and population dynamics of this insect was conducted during the 2002 growing season at the Louisiana State University Rice Research Station, Crowley, Acadia Parish, LA, an area where it is a particularly severe pest. By monitoring weevil populations using collections from overwintering sites, from plots of rice planted throughout the growing season, and from light traps, and by dissecting collected weevils to assess the conditions of their fat bodies, flight muscles and ovaries, we concluded that a portion of the weevil population in Louisiana is univoltine, another portion is bivoltine, and another portion may pass through multiple generations if young rice is continually available. However, only one generation of weevils developed in a single rice field. Adult weevils invaded rice fields in apparently large numbers prior to flooding. Weevils possessing both well-developed ovaries and well-developed flight muscles were found in both light traps and rice plots, suggesting that adults were capable of seeking new habitats by flying if rice plants were not suitable for oviposition. Weevils were able to complete a generation on ratoon-crop rice. The emergence of overwintered weevils started in late March, with peak emergence occurring during April and May. Return to overwintering sites began in early June and continued until October. Weevils appeared to move among overwintering habitats. A comparison of weevil population dynamics in rice plots planted on different dates supported the use of early planting as a management strategy.

scholarly journals Subclinical Cardiac Dysfunction in Children with Coeliac Disease: Is the Gluten-Free Diet Effective?

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Berna Saylan ◽  
Ayhan Cevik ◽  
Ceyda Tuna Kirsaclioglu ◽  
Filiz Ekici ◽  
Ozgur Tosun ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Coeliac Disease ◽  
Systolic Function ◽  
Left Ventricular Systolic Function ◽  
Tissue Doppler ◽  
Left Ventricular ◽  
Appropriate Treatment ◽  
Significant Difference ◽  
Patient Groups

Objectives. The aim of this study is to investigate the effects of coeliac disease on cardiac function in children using conventional transthoracic echocardiography (TTE) and tissue Doppler echocardiography (TDE). Methods. Coeliac disease patients were evaluated in two different groups based on serum endomysial antibody (EmA) titers (EmA (+) and EmA (−)), and the data obtained by conventional and TDE studies were compared between the patient groups and healthy controls. Results. There was no significant difference between EmA (+) and EmA (−) groups in terms of the conventional TTE parameters, including ejection fraction (EF), fractional shortening (FS), and left ventricle end diastolic diameter (LVEDD), that show the left ventricular systolic function (P=0.727, P=0.317, P=0.118). TDE showed a significant difference in left ventricle (LV) isovolumic relaxation time (LV IVRT) and LV myocardial performance index (LV MPI) parameters between EmA (+) and EmA (−) patient groups (P<0.0001). Conclusion. The measurement of LV MPI and LV IVRT parameters by TDE would be beneficial in early determination of the cardiac involvement and establishing appropriate treatment and followup of patients with coeliac disease as well as in making distinction between EmA (+) and EmA (−) patients.

Detection of Circulating Tissue Factor and Factor VII in a Normal Population

1996 ◽  
Vol 75 (05) ◽  
pp. 772-777 ◽  
Author(s):  
Sybille Albrecht ◽  
Matthias Kotzsch ◽  
Gabriele Siegert ◽  
Thomas Luther ◽  
Heinz Großmann ◽  
...  
Keyword(s):  
Tissue Factor ◽  
Normal Population ◽  
Mean Value ◽  
Factor Vii ◽  
Significant Difference ◽  
Age Dependent ◽  
The Mean ◽  
Highly Correlated ◽  
And Gender

SummaryThe plasma tissue factor (TF) concentration was correlated to factor VII concentration (FVIIag) and factor VII activity (FVIIc) in 498 healthy volunteers ranging in age from 17 to 64 years. Immunoassays using monoclonal antibodies (mAbs) were developed for the determination of TF and FVIIag in plasma. The mAbs and the test systems were characterized. The mean value of the TF concentration was 172 ± 135 pg/ml. TF showed no age- and gender-related differences. For the total population, FVIIc, determined by a clotting test, was 110 ± 15% and the factor VIlag was 0.77 ± 0.19 μg/ml. FVII activity was significantly increased with age, whereas the concentration demonstrated no correlation to age in this population. FVII concentration is highly correlated with the activity as measured by clotting assay using rabbit thromboplastin. The ratio between FVIIc and FVIIag was not age-dependent, but demonstrated a significant difference between men and women. Between TF and FVII we could not detect a correlation.

Improvement Of Curvilinear Diagrams Of Concrete Deformation

2019 ◽  
pp. 99-104
Keyword(s):  
Reinforced Concrete ◽  
Peak Load ◽  
Experimental Studies ◽  
Concrete Structures ◽  
Deformation Model ◽  
Reinforced Concrete Structures ◽  
Significant Difference ◽  
Deformation Diagrams

Problems when calculating reinforced concrete structures based on the concrete deformation under compression diagram, which is presented both in Russian and foreign regulatory documents on the design of concrete and reinforced concrete structures are considered. The correctness of their compliance for all classes of concrete remains very approximate, especially a significant difference occurs when using Euronorm due to the different shape and sizes of the samples. At present, there are no methodical recommendations for determining the ultimate relative deformations of concrete under axial compression and the construction of curvilinear deformation diagrams, which leads to limited experimental data and, as a result, does not make it possible to enter more detailed ultimate strain values into domestic standards. The results of experimental studies to determine the ultimate relative deformations of concrete under compression for different classes of concrete, which allowed to make analytical dependences for the evaluation of the ultimate relative deformations and description of curvilinear deformation diagrams, are presented. The article discusses various options for using the deformation model to assess the stress-strain state of the structure, it is concluded that it is necessary to use not only the finite values of the ultimate deformations, but also their intermediate values. This requires reliable diagrams "s–e” for all classes of concrete. The difficulties of measuring deformations in concrete subjected to peak load, corresponding to the prismatic strength, as well as main cracks that appeared under conditions of long-term step loading are highlighted. Variants of more accurate measurements are proposed. Development and implementation of the new standard GOST "Concretes. Methods for determination of complete diagrams" on the basis of the developed method for obtaining complete diagrams of concrete deformation under compression for the evaluation of ultimate deformability of concrete under compression are necessary.

Nitrogen Requirement of Potato for Eastern Indo-Gangatic Plain of India

2020 ◽  
Vol 7 (03) ◽  
Author(s):  
S. K. YADAV ◽  
R. K. SINGH ◽  
V. K. DUA ◽  
S SINGH ◽  
SARALA YADAV ◽  
...  
Keyword(s):  
Tuber Yield ◽  
Potato Crop ◽  
Block Design ◽  
Nitrogen Level ◽  
Cost Ratio ◽  
Research Station ◽  
Net Benefit ◽  
Marketable Tuber ◽  
Benefit Cost Ratio ◽  
Significant Difference

A field experiment was carried out during 2015-16 and 2016-17 at ICAR-Central Potato Research Station, Patna, Bihar, in randomized block design with four replications with objective to quantity the optimum requirement of nitrogen to potato crop. Significantly the highest plant height was recorded with nitrogen level of 300 kg/ha. Distributions of the smallest size of tuber yield of potato were decreasing with increasing the level of nitrogen. There was about 26.0% more yield of the smallest size tuber of potato was recorded with zero nitrogen as compare to the highest level of nitrogen i.e. 300 kg/ha. Increasing the nitrogen over the level of 150 to 225 kg per hectare, increasing the yield of tuber gradually slower rate than nitrogen level from 0 to 150 kg/ha. Total and marketable tuber yield of potato were increasing significantly with increasing level of nitrogen up to 150 kg/ha. There was no significant difference in marketable tuber yield was found for nitrogen level between 150 and 225 kg/ha. Highest (1.66) net benefit cost ratio was also recorded with level of nitrogen @ 150 kg/ha in potato. Hence, application of nitrogen @ 150 kg/ha was found statistically and economically more beneficial for potato cultivation in Eastern Indo-Gangatic plain of India.

scholarly journals Determination of vertical dimension of occlusion by using the phonetic vowel "O" and "E"

2015 ◽  
Vol 72 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Marko Igic ◽  
Nebojsa Krunic ◽  
Ljiljana Aleksov ◽  
Milena Kostic ◽  
Aleksandra Igic ◽  
...  
Keyword(s):  
Cognitive Functions ◽  
Complete Denture ◽  
Reference Points ◽  
Vertical Dimension ◽  
Entire Sample ◽  
Average Value ◽  
Significant Difference ◽  
The Relationship

Background/Aim. The vertical dimension of occlusion is a very important parameter for proper reconstruction of the relationship between the jaws. The literature describes many methods for its finding, from the simple, easily applicable clinically, to quite complicated, with the use of one or more devices for determination. The aim of this study was to examine the possibility of determining the vertical dimension of occlusion using the vocals ?O? and ?E? with the control of values o btained by applying cognitive functions. Methods. This investigation was performed with the two groups of patients. The first group consisted of 50 females and 50 males, aged 18 to 30 years. In this group the distance between the reference points (on top of the nose and chin) was measured in the position of the mandible in the vertical dimension of occlusion, the vertical dimension at rest and the pronunciation of the words ?OLO? and ?ELE?. Checking the correctness of the particular value for the word ?OLO? was also performed by the phonetic method with the application of cognitive exercises when the patients counted from 89 to 80. The obtained difference in the average values i n determining the vertical dimension of occlusion and the ?OLO? and ?ELE? in the first group was used as the reference for determining the vertical dimension of occlusion in the second group of patients. The second group comprised of 31 edentulous persons (14 females and 17 males), aged from 54 to 85 years who had been made a complete denture. Results. The average value obtained for the vertical dimension of rest for the entire sample was 2.16 mm, for the word ?OLO? for the entire sample was 5.51 mm and for the word ?ELE? for the entire sample was 7.47 mm. There was no statistically significant difference between the genders for the value of the vertical dimension at rest, ?ELE? and ?OLO?. There was a statistically significant difference between the values f or the vertical dimension at rest, ?OLO? and ?ELE? for both genders. There was a statistically significant correlation between the value for the vertical dimension at rest, ?OLO? and ?ELE?, for both groups of subjects. Conclusion. Determining the vertical dimension of occlusion requires 5.5 mm subtraction from the position of the mandible in pronunciation of the word ?OLO? or 7.5 mm in pronunciation of the word ?ELE?.

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