Control of Aphids and Whiteflies on Watermelon, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 194-194
Author(s):  
S. E. Webb
Keyword(s):  
High Rate ◽  
Hollow Cone ◽  
Central Florida ◽  
Root Transformation ◽  
Aphid Control ◽  
Direct Seeded ◽  
Research And Education ◽  
Separation Test ◽  
Low Rate ◽  
Leaf Disks

Abstract Watermelon was direct-seeded on 30 Mar at the Central Florida Research and Education Center, Leesburg, FL. Each plot consisted of four 35-ft rows, 7 ft apart with plants spaced 2.5 ft apart. Treatments were replicated four times in an RCB design. Fungicide (mancozeb or chlorothalonil) was applied weekly, usually 2 d after insecticides. All materials were applied with a 2-row tractor-mounted boom sprayer with 18 Albuz (lilac) ceramic hollow cone nozzles, spaced 8 inches apart, delivering 178 gpa at 400 psi or 133 gpa at 200 psi (CGA-215944 and Thiodan only). Silwet (0.02% or 0.03%, vohvol) was tank-mixed with Mycotrol. CGA-215944 was tested for aphid control only and was applied when the number of aphids exceeded five per leaf (high rate on 24 May only, low rate on 24 May and 7 Jun). All other treatments were applied on 24 May, 1,7, 13, and 20 Jun except Thiodan which was not applied on 24 May. Small whitefly nymphs (first and second instars) and large nymphs (third and fourth instars, pupae) were counted and summed on three 0.6-inch diam leaf disks cut from each of 20 leaves per plot for 5 weeks, beginning on 29 May and ending on 26 Jun. Aphids were counted on whole leaves. A square root transformation was used to stabilize the variance of counts for analysis. A two-way ANOVA and a mean separation test (Waller-Duncan k-ratio) were used to determine differences among treatments.

scholarly journals Control of Pickleworm on Squash with Selective Insecticides, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 142-143
Author(s):  
Susan E. Webb
Keyword(s):  
Analysis Of Variance ◽  
Hollow Cone ◽  
Central Florida ◽  
Lepidopterous Pest ◽  
Untreated Check ◽  
Direct Seeded ◽  
Research And Education ◽  
Selective Insecticides ◽  
Separation Test

Abstract Insecticides specific for lepidopterous pest-were compared with a standard, Thiodan, and an untreated check for control of pickleworm. Squash was direct seeded on 1 Apr at the Central Florida Research and Education Center, Leesburg, FL. Each plot consisted of four 25-ft rows, 6 ft apart with plants spaced 2.5 ft apart. Treatments were replicated four times in an RCB design. All chemicals were applied with a 2-row tractor-mounted boom sprayer with 18 Albuz (lilac) ceramic hollow-cone nozzles spaced 8 inches apart, delivering 133 gpa at 200 psi. Latron CS-7, a surfactant, was tank-mixed with Confirm and RH-2485 at a concentration of 0.12% vol:vol. Treatments were applied weekly from 14 May to 11 Jun. Fruits were harvested, separated into marketable and damaged, counted, and weighed three times per week from 12 May to 16 Jun. An analysis of variance and a mean separation test (WD) were used to determine significant differences among treatments.

A Note on Groove Depth Changes Without Wear

1980 ◽  
Vol 8 (1) ◽  
pp. 10-12
Author(s):  
F. C. Brenner
Keyword(s):  
Weight Loss ◽  
Wear Test ◽  
Groove Depth ◽  
High Rate ◽  
Weight Changes ◽  
Wear Rates ◽  
Weight Loss Method ◽  
Loss Method ◽  
And Storage ◽  
Low Rate

Abstract Tread wear rates during first wear measured by groove depth and weight changes do not always agree. Sometimes, the groove depth method shows a high rate and the weight loss method a low rate. Reported here are experiments designed to determine if grooves show depth changes without wear. Four tires were measured before mounting on a wheel, after mounting and inflation, and after inflation and storage. The mounted and inflated tires showed shallower shoulder grooves and deeper center grooves than the unmounted tires. In a second experiment, tires were measured immediately after a tread wear test and then stored mounted for two weeks before remeasuring. Each groove became deeper, and there was no change in the crown radius of any tire.

scholarly journals Combining High- and Low-Rate Geodetic Data Analysis for Unveiling Rapid Magma Transfer Feeding a Sequence of Violent Summit Paroxysms at Etna in Late 2015

2021 ◽  
Vol 11 (10) ◽  
pp. 4630
Author(s):  
Alessandro Bonforte ◽  
Flavio Cannavò ◽  
Salvatore Gambino ◽  
Francesco Guglielmino
Keyword(s):  
Ground Deformation ◽  
High Rate ◽  
Rate Data ◽  
Scale Analysis ◽  
Feeding System ◽  
Magma Sources ◽  
Mt Etna ◽  
Multi Temporal ◽  
Gnss Measurements ◽  
Low Rate

We propose a multi-temporal-scale analysis of ground deformation data using both high-rate tilt and GNSS measurements and the DInSAR and daily GNSS solutions in order to investigate a sequence of four paroxysmal episodes of the Voragine crater occurring in December 2015 at Mt. Etna (Italy). The analysis aimed at inferring the magma sources feeding a sequence of very violent eruptions, in order to understand the dynamics and to image the shallow feeding system of the volcano that enabled such a rapid magma accumulation and discharge. The high-rate data allowed us to constrain the sources responsible for the fast and violent dynamics of each paroxysm, while the cumulated deformation measured by DInSAR and daily GNSS solutions, over a period of 12 days encompassing the entire eruptive sequence, also showed the deeper part of the source involved in the considered period, where magma was stored. We defined the dynamics and rates of the magma transfer, with a middle-depth storage of gas-rich magma that charges, more or less continuously, a shallower level where magma stops temporarily, accumulating pressure due to the gas exsolution. This machine-gun-like mechanism could represent a general conceptual model for similar events at Etna and at all volcanoes.

PARAMETERS FOR DYNAMIC SIMULATION OF W ASTEW ATER TREATMENT PLANTS WITH HIGH-RATE AND LOW-RATE ACTIVATED SLUDGE TANKS

1994 ◽  
Vol 30 (4) ◽  
pp. 211-214 ◽  
Author(s):  
E. Brands ◽  
M. Liebeskind ◽  
M. Dohmann
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Dynamic Simulation ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
High Rate ◽  
Yield Coefficient ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants ◽  
Low Rate

This study shows a comparison of important parameters for dynamic simulation concerning the highrate and low-rate activated sludge tanks of several municipal wastewater treatment plants. The parameters for the dynamic simulation of the single-stage process are quite well known, but parameters for the high-ratellow-rate activated sludge process are still missi ng, although a considerable number of wastewater treatment plants are designed and operated that way. At present any attempt to simulate their operation is restricted to the second stage due to missing data concerning growth rate, decay rate, yield coefficient and others.

Noncontingent Nonreinforcement of a Response as the Aversive Event in a Cer Paradigm

1971 ◽  
Vol 29 (3_suppl) ◽  
pp. 1196-1198 ◽  
Author(s):  
Richard S. Calef ◽  
Richard A. Kaufman ◽  
Ronald N. Bone ◽  
Steven A. Werk
Keyword(s):  
Reinforcement Schedule ◽  
Present Experiment ◽  
High Density ◽  
High Rate ◽  
Aversive Event ◽  
Necessary Condition ◽  
Facilitation Effect ◽  
Response Facilitation ◽  
Early Training ◽  
Low Rate

The present experiment investigated the effects of noncontingent nonreinforcement as the aversive event in a CER paradigm. The results showed a significant response-facilitation effect during early training, but none during later training with a high rate-producing, high-density reinforcement schedule. The present results imply that a low rate-producing, high-density reinforcement schedule is not a necessary condition for response facilitation.

Scenario Prediction of China’s Natural Gas Consumption and Carbon Emissions in the Next Ten Years

2021 ◽  
Vol 16 (3) ◽  
pp. 569-587
Author(s):  
Chunzi Wang ◽  
◽  
Mingxiong Zhu ◽  
Keyword(s):  
Economic Growth ◽  
Natural Gas ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Gas Production ◽  
High Rate ◽  
Carbon Emission Reduction ◽  
Gas Consumption ◽  
Natural Gas Consumption ◽  
Low Rate

Based on Johansen Cointegration Test, this paper sheds light on the long-run equilibrium relationship between natural gas consumption, gas production, and GDP in China. Three different natural gas demand scenarios of low, medium and high rates in the next ten years are considered, and a Neural Network Autoregression Model is used to predict the future carbon dioxide emission. We conclude: (1) In all three scenarios, the growth rates of natural gas consumption are all higher than those of natural gas production, while the gap between demand and domestic supply will gradually turn broader and China will largely rely on imports ; (2) In the scenario of low-rate economic growth, natural gas consumption will grow slowly, and it will be difficult to realize the carbon emission reduction targets by 2030 due to low-rate substitution of natural gas for coal; (3) If medium-rate to high-rate economic growth sustains, coupled with rapid increase in natural gas consumption and production, China’s Carbon Emission Reduction Targets for 2030 can be achieved with high-rate substitution of natural gas for coal.

China's Population Aging and New Urbanization

2016 ◽  
pp. 106-124
Author(s):  
Mingxing Chen ◽  
Hua Zhang ◽  
Yinghua Gong
Keyword(s):  
Chinese Population ◽  
Population Aging ◽  
High Rate ◽  
Natural Growth ◽  
The Sustainable Development ◽  
Aged Population ◽  
The World ◽  
Long Time ◽  
Low Rate ◽  
New Urbanization

In recent years, fast demographic transition, urbanizationand socio-economic development in China draws attention of the world. The reproduction type of Chinese population has changed from “high rate of birth, high rate of death, and low rate of natural growth” to “low rate of birth, low rate of death, and low rate of natural growth”, which promotes the population transition, bringing the problems of aging of population. In China, the scale of aged population is large, and its developing speed is fast. Along with the increasing of aged population in China, the advantage of labor quantity in China is challenged. China regards new urbanization as the important work content of state in the future for a long time, providing a large opportunity for the study in the field of urbanization. For China, new urbanization plan is just a beginning. The sustainable development of Chinese population and urbanization has important meaning in the world.

Herbicide Concentrations in Honey Mesquite Phloem

Weed Science ◽  
1972 ◽  
Vol 20 (3) ◽  
pp. 264-267 ◽  
Author(s):  
F. S. Davis ◽  
R. E. Meyer ◽  
J. R. Baur ◽  
R. W. Bovey
Keyword(s):  
Acetic Acid ◽  
Prosopis Juliflora ◽  
High Rate ◽  
Soil Line ◽  
Herbicide Concentration ◽  
Low Rate ◽  
Honey Mesquite

Herbicide content in honey mesquite(Prosopis juliflora(Swartz) DC. var.glandulosa(Torr.) Cockerell) phloem 48 hr after treatment was higher in stems within 20 cm of the foliage than in those near the soil line. Similar levels of (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T) occurred from applications of either 0.56 or 1.12 kg/ha, whereas three times as much 4-amino-3,5,6-trichloropicolinic acid (picloram) occurred in plants sprayed with the high rate than in those sprayed with the low rate. Herbicide concentration was highest in June and lowest in August.

scholarly journals Adaptations in the calcium and phosphorus metabolism of sheep in response to an intravenous infusion of Ca

1978 ◽  
Vol 40 (1) ◽  
pp. 17-21 ◽  
Author(s):  
G. D. Braithwaite
Keyword(s):  
Intravenous Infusion ◽  
High Rate ◽  
Phosphorus Metabolism ◽  
Active Absorption ◽  
Rate Of Absorption ◽  
Calcium And Phosphorus ◽  
Maximum Retention ◽  
P Retention ◽  
Low Rate

1. The effect on calcium and phosphorus metabolism of a high rate of Ca infused directly into the blood of Ca-deficient wethers, already receiving an adequate Ca intake, has been studied by a combination of balance and radioisotope techniques.2. The rate of Ca retention, which was already high, increased only slightly during the infusion before it reached a maximum. The surplus Ca was compensated for by a decrease in the rate of absorption and an increase in the rate of urinary Ca excretion.3. These findings support the theory that at maximum retention the rate of Ca absorption becomes regulated according to the rate at which Ca can be stored in bone.4. Results suggest that the decreased absorption was due to a decrease in the rate of active absorption and that the low rate remaining was due to diffusion.5. The rate of P retention was increased by the Ca infusion, possibly as a result of the increased Ca retention.

scholarly journals Lepidopterous Larvae Control with Insecticides, Pasquotank Co., N.C., 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 99-99
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
Hollow Cone ◽  
Single Row ◽  
Foliar Damage ◽  
Direct Seeded

Abstract ‘Gourmet’ cabbage was direct seeded in early Mar near Weeksville, NC. Single row plots 10 ft. long on 42 inch centers were replicated 4 times in a RCB design. Alleys of 5 ft. were used between replicates. Treatments were applied with a CO2 pressurized backpack sprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gal/acre. Applications with Triton AG-98 (spreader) were made with all treatments 2, 9, 16 and 23 May. Visual estimates of foliar damage and insect counts were made 9, 16, 23 and 30 May. No CL were present on 9 and 16 May.

Sign in / Sign up

Export Citation Format

Share Document