Comparison of alternative pest and soil management strategies for Maine potato production systems

1998 ◽  
Vol 13 (4) ◽  
pp. 146-161 ◽  
Author(s):  
E.R. Gallandt ◽  
E.B. Mallory ◽  
A.R. Alford ◽  
F.A. Drummond ◽  
E. Groden ◽  
...  
Keyword(s):  
Pest Management ◽  
Soil Quality ◽  
Management System ◽  
Management Strategies ◽  
Soil Management ◽  
Management Systems ◽  
Input System ◽  
Conventional Systems ◽  
Pest Management Systems ◽  
Amended Soil

AbstractPotato acreage and total production in Maine have declined steadily since the 1960s. In 1991, a University of Maine research team established a large-scale, long-term, comparative study of three factors that form the foundation of productive potato cropping systems: soil management, pest management, and variety choice. This study, the Potato Ecosystem Project, included 96 main plots (5.8 ha total) and near-by “component studies.” The project contrasted amended vs. unamended soil management strategies; conventional vs. reduced-input vs. bio-intensive pest management strategies; and disease and stress susceptible vs. tolerant potato varieties. Given recent concerns over resistance to pesticides and increasing costs of agricultural chemical inputs, the reduced-input and bio-intensive pest management systems provided encouraging results. Weed growth was similar in the conventional and reduced-input systems. Colorado potato beetle thresholds were exceeded less often and their densities were lower in the bio-intensive system than in the reduced-input and conventional systems. Lady beetles, which are major aphid predators, were more abundant in the bio-intensive pest management system compared with the reduced-input and conventional systems in 5 of the 6 years. Tuber yield and quality were maintained at a high level in the reduced-input system, although difficulties with plant disease, nutrient and weed management contributed to significantly lower yields in the bio-intensive pest management system. Economic analysis indicated that from 1993 to 1996, the reduced-input system had a greater return over variable cost (avg. $973 ha-1) than the conventional (avg. $890ha-1) and bio-intensive pest management systems (avg. $578ha-1). The amended soil management system achieved rapid improvements in soil quality: soil organic matter, water stable aggregates, potassium, and soluble inorganic phosphorus contents increased while requirements for synthetic fertilizers were reduced. These improvements in soil quality enhanced late-season crop vigor, canopy duration and tuber quality, and increased yields by 13% and 30% over the unamended system in 1994 and 1995, respectively, but not in 1996. Improved crop vigor in the amended soil management system also benefited weed control efforts by encouraging a more weed-suppressive potato crop. In the biointensive pest management system, in which weeds were controlled mechanically, the amended soil management system had less weed biomass than the unamended soil management system in 1994 and 1995. Conversely, the amended soil management system consistently increased flea beetle populations and, in one of two years, the incidence of Rhizoctonia. The choice of potato variety also affected pest dynamics. Total aphid density (all aphid species considered together) and almost all disease ratings were higher on ‘Superior’ than ‘Atlantic’ potato.

Effects of pest and soil management systems on weed dynamics in potato

Weed Science ◽  
1998 ◽  
Vol 46 (2) ◽  
pp. 238-248 ◽  
Author(s):  
Eric R. Gallandt ◽  
Matt Liebman ◽  
Sue Corson ◽  
Gregory A. Porter ◽  
Silke D. Ullrich
Keyword(s):  
Pest Management ◽  
Weed Management ◽  
Management System ◽  
Yield Loss ◽  
Soil Management ◽  
Management Systems ◽  
Weed Biomass ◽  
Common Lambsquarters ◽  
Synthetic Fertilizer ◽  
Rotation Crop

Results from the “Potato Ecosystem Project,” a cropping systems study in northern Maine, were used to test the hypothesis that greater reliance on organic nutrient sources and less reliance on synthetic fertilizer sources can benefit weed management efforts. ‘Atlantic’ potato was grown in a 2-yr rotation within a factorial arrangement of three pest management systems, two soil management systems, and both rotation entry points. Weed control in the conventional (CONV) pest management system relied on full rates of herbicides, whereas the biointensive (BIO) system relied exclusively on cultivation. The reduced input (RI) pest management system relied on cultivation in 1991 and 1992 and on 50% of standard herbicide rates plus cultivation from 1993 to 1995. The two soil management systems, unamended (barley/red clover rotation crop; 1× synthetic fertilizer for potato) and amended (pea/oat/hairy vetch green manure rotation crop; manure, compost, and 0.5× synthetic fertilizer for potato) contrasted practices typical for the region to those designed to achieve rapid improvements in soil quality. Midseason weed biomass in potato was dominated by common lambsquarters. In 1991 and 1992, weed biomass in potato was least in the CONV system and did not differ between the RI and BIO systems. In 1993, weeds in both RI and CONV potatoes were effectively suppressed below the level measured in the BIO system. Soil management had no effect on weed biomass from 1991 to 1993 but became an important factor affecting weeds in the BIO system in 1994 and 1995. Weed biomass was 77% lower in 1994 and 72% lower in 1995 in the amended soil management system than in the unamended system. No significant yield loss due to weeds was detected in the 1994 BIO system, but in 1995 yield loss due to weeds was 37% in the unamended system compared to 12% in the amended system. Soil management effects on weeds in the 1994 BIO pest management system carried through to the following season's germinable seed bank. Density of germinable common lambsquarters seed (0 to 10 cm soil depth) in the 1995 BIO system was 4,082 m−2in the unamended soil management system compared to 1,280 m−2in the amended soil management system. We suggest that organic amendments and green manure promote a potato crop better able to compete with weeds and that these inputs be considered as potentially important components of integrated weed management systems that have minimal reliance on herbicides.

scholarly journals PENGARUH POLA PENGELOLAAN HAMA TERHADAP POPULASI SERANGGA HAMA PADA LAHAN KEDELAI VARIETAS ANJASMORO DAN WILIS

2017 ◽  
Vol 16 (1) ◽  
pp. 25
Author(s):  
Mahardika Puspitasari ◽  
Purnama Hidayat ◽  
Pudjianto . ◽  
Marwoto . ◽  
Bambang Tri Rahardjo
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Chemical Control ◽  
Management System ◽  
Disease Incidence ◽  
Block Design ◽  
Insect Pest ◽  
Management Systems ◽  
Pest Population ◽  
Pest Management Systems

Effect of pest management systems to the insect pests population on Anjasmoro and Wilis soybean varieties. The integrated pest management (IPM) is a pest control approach which is based on ecological and economic considerations. The objective of this research was to study the effect of different pest management systems on the insect pest population using two soybean varieties, Anjasmoro and Wilis.The experiments were done in a randomized complete block design, repeated twice. The pest management systems under the different plots were integrated pest management, non-chemical control, chemical control, and the control (which received neither chemicals nor IPM). Observations were made on the pest population and the intensity of the damage caused by primary soybean pests. The primary pests observed were Ophiomya phaseoli, Aphis gossypii, Lamprosema indicata, Spodoptera litura, Bemisia tabaci, Riptortus linearis and Etiella zinckenella. Integrated pest management significantly affect the population of whitefly on Anjasmoro variety but not on Wilis variety. The populations of bean fly, aphid, leaf roller, armyworm, stink bug and pod borer were not affected by pest management system. The lower yield of Anjasmoro variety was attributed to the attack by a viral infection whose disease incidence reached 80% on the plots without a pest management system. IPM management system was more efficient than chemical management system.

A quest for ecologically based pest management systems

1983 ◽  
Vol 7 (1) ◽  
pp. 91-99 ◽  
Author(s):  
M. A. Altieri ◽  
P. B. Martin ◽  
W. J. Lewis
Keyword(s):  
Pest Management ◽  
Management Systems ◽  
Pest Management Systems

Pest management systems affect composition but not abundance of phytoseiid mites (Acari: Phytoseiidae) in apple orchards

2013 ◽  
Vol 62 (4) ◽  
pp. 525-537 ◽  
Author(s):  
Árpád Szabó ◽  
Béla Pénzes ◽  
Péter Sipos ◽  
Tamás Hegyi ◽  
Zsuzsanna Hajdú ◽  
...  
Keyword(s):  
Pest Management ◽  
Management Systems ◽  
Apple Orchards ◽  
Phytoseiid Mites ◽  
Pest Management Systems

Extension Implementation of Integrated Pest Management Systems

Weed Science ◽  
1982 ◽  
Vol 30 (S1) ◽  
pp. 48-53 ◽  
Author(s):  
B. D. Blair ◽  
J. V. Parochetti
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Pest Control ◽  
Control Technique ◽  
Management Systems ◽  
Control Techniques ◽  
Pesticide Management ◽  
Chemical Pesticide ◽  
Environmentally Sound ◽  
Pest Management Systems

A considerable amount of scientific time has been spent defining Integrated Pest Management (IPM). The following is quoted from an Extension Committee on Organization and Policy publication (4): “Integrated Pest Management (IPM) is a system that utilizes all suitable pest control techniques and methods to keep pest populations below economically injurious levels. Each pest control technique must be environmentally sound and compatible with production and user objectives. Integrated Pest Management is more than chemical pesticide management. In many cases it includes biological, cultural, and sanitary control practices for all pest complexes.”

scholarly journals Do organization-level quality management systems influence department-level quality? A cross-sectional study across 32 large hospitals in Australia

2020 ◽  
Vol 32 (Supplement_1) ◽  
pp. 35-42
Author(s):  
Natalie Taylor ◽  
Robyn Clay-Williams ◽  
Hsuen P Ting ◽  
Gaston Arnolda ◽  
Teresa Winata ◽  
...  
Keyword(s):  
Quality Management ◽  
Management System ◽  
Quality Management System ◽  
Management Strategies ◽  
Hospital Quality ◽  
Management Systems ◽  
Quality Systems ◽  
Cross Sectional ◽  
Quality Management Systems ◽  
Organization Level

Abstract Objective Little is known about the influence that hospital quality systems have on quality at department level, in Australia and elsewhere. This study assessed the relationships between organizational-level quality management systems, and the extent to which hospital-level quality management systems and department-level quality management strategies are related. Design A multi-level, cross-sectional, mixed-method study. Setting and participants As part of the Deepening our Understanding of Quality in Australia (DUQuA) project, we invited all large hospitals in Australia (~200 or more beds) which provided acute myocardial infarction (AMI), hip fracture and stroke care. The quality managers of these hospitals were the respondents for one of seven measures of hospital quality management systems and strategies. Data across the six remaining measures were collected through site visits by external surveyors assessing the participating hospitals. Main outcome measures Relationships were assessed between three organization-level quality management system measures: a self-report measure assessing organization-level quality activities (quality management systems index, QMSI); externally assessed organization-level compliance to procedures used to plan, monitor and improve quality of care (quality management compliance index, QMCI); and externally assessed implementation of quality systems (clinical quality implementation index, CQII). Associations were also assessed between organization-level quality management systems and department-level quality management strategies: how clinical responsibilities are assigned for a particular condition; whether department organization processes are organized to facilitate evidence-based care recommendations; compliance with selected recommendations of international agencies; and whether clinical reviews are performed systematically. Results Of 78 invited hospitals, 32 participated in the study. QMSI was positively associated with QMCI and CQII, but after controlling for QMSI, no relationship was found between QMCI and CQII. There appears to be a cluster of relationships between QMSI and department-level measures, but this was not consistent across all departments. Conclusion This is the first national study undertaken in Australia to assess relationships within and between organization-level and department-level quality management systems. These quality management system tools align with many components of accreditation standards and may be useful for hospitals in continuously monitoring and driving improvement.

scholarly journals Selecting soil quality indicators for different soil management systems in the Brazilian Cerrado

2016 ◽  
Vol 51 (9) ◽  
pp. 1643-1651 ◽  
Author(s):  
Diane Cristina Stefanoski ◽  
Cícero Célio de Figueiredo ◽  
Glenio Guimarães Santos ◽  
Robélio Leandro Marchão
Keyword(s):  
Soil Quality ◽  
Quality Indicators ◽  
Soil Depth ◽  
Principal Component ◽  
Soil Management ◽  
Biological Indicators ◽  
Management Systems ◽  
Brazilian Cerrado ◽  
Soil Quality Indicators ◽  
Physical Chemical

Abstract The objective of this work was to assess soil quality indicators obtained with different datasets to compare soil management systems in the Brazilian Cerrado. Three criteria were used to select soil physical, chemical, and biological indicators: the full set of indicators obtained, with 36 parameters, for which all the physical, chemical, and biological soil properties were determined; a subset of indicators selected by principal component analysis (20 parameters); and a subset of indicators with some frequency of use in the literature (16 parameters). These indicators were obtained from the following management systems: no-tillage, conventional tillage, and native cerrado vegetation. Soil samples were collected at 0.0-0.1-m soil depth, and soil quality indicators were subjected to analysis of variance and their means were compared. The incorporation of soil native cerrado into agriculture decreased soil quality. The most commonly used indicators in the scientific literature are sensitive enough to detect differences in soil quality according to land use. Therefore, the selection of a minimum set of representative data can be more useful than a complex set of properties to compare management systems as to their soil quality.

Economic impacts of extended grazing systems

1990 ◽  
Vol 5 (3) ◽  
pp. 120-125 ◽  
Author(s):  
G. E. D'Souza ◽  
E. W. Maxwell ◽  
W. B. Bryan ◽  
E. C. Prigge
Keyword(s):  
Management System ◽  
Economic Impacts ◽  
Livestock Production ◽  
Production Costs ◽  
Management Systems ◽  
Beef Cow ◽  
Grazing System ◽  
Grazing Systems ◽  
Cow Calf ◽  
Conventional Systems

AbstractExtended grazing is a management system in which the usual grazing season is lengthened by utilization of hay fields for pasture. Extended grazing systems are a low-input alternative to conventional systems to the extent that they decrease the reliance on inputs such as machinery and energy to harvest forage. Substituting pasturing for harvested forage can therefore potentially decrease production costs and enhance the profitability of livestock production. However, the farm-level economic impacts of such a substitution are not well known. This analysis quantifies these impacts for beef cow/calf production. Specifying alternative meadow management systems for different grasses and using an economic-engineering approach, we have found that extended grazing can be a more profitable option for cow/calf production. Other findings suggest that, in an extended grazing system, the type of meadow, the hay baling method and the associated hay spoilage level also have important effects on production costs and profitability.

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