Results 301 to 310 of about 776,154 (331)

Estimating multidimensional economic injury levels with simulation models

Agricultural Systems, 1988
Abstract Simulation models were used to establish economic indicators for pest management purposes. This approach was applied to estimate economic injury levels (EIL) for bean leaf beetles on soybeans and to determine, through sensitivity analyses, how changes in soybean prices, scouting costs, and yield affect the value of the economic injury level ...
M.B. Nordh, L.R. Zavaleta, W.G. Ruesink
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Grasshopper Injury to Potato: Consumption, Effect on Photosynthesis, and Economic Injury Level

Agronomy Journal, 2011
Generalist grasshopper species feed at agricultural field edges, often triggering management practices because of defoliation injury. Few controlled studies in agroecosystems, however, have quantified grasshopper consumption or plant photosynthetic response to feeding.
Cristina Bastos, Sean D. Whipple, W. Wyatt Hoback, Leon G. Higley   +3 more
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Injury Equivalency as a Basis for Developing Multiple-Species Economic Injury Levels

Journal of Economic Entomology, 1988
A technique for developing and using multiple-species economic injury levels (EILs) is proposed, discussed, and evaluated. Grouping insects into injury guilds, based on the plant’s physiological response to the injury, forms the theoretical basis for the multiple-species approach.
Scott H. Hutchins, Leon G. Higley, Larry P. Pedigo   +2 more
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Economic Injury Levels for Interseasonal Control of Rangeland Insects

Journal of Economic Entomology, 1989
The economic injury level (ElL) model traditionally used in pest management was extended to include control of univoltine pests for which multiple years of control benefits are expected: The model was then applied to control of grasshoppers (Acrididae) invading western rangelands.
L. A. Torell, J. H. Davis, E. W. Huddleston, D. C. Thompson   +3 more
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Damage assessment of Bemisia tabaci and economic injury level on soybean

Crop Protection, 2021
Abstract The whitefly Bemisia tabaci is the second most widespread and economically important arthropod pest in the world, with frequent population outbreaks occurring in Brazil and increasing economic damage on soybean crops. High oviposition rate, short life cycle and uneven distribution along the plants’ canopy favour the dissemination of B ...
Guilherme Padilha, Henrique Pozebon, Leonardo S. Patias, Dener R. Ferreira, Lauren B. Castilhos, Sarah E. Forgiarini, Alessandro Donatti, Julia G. Bevilaqua, Rafael P. Marques, Daniela Moro, Alberto Rohrig, Scheila A.S. Bones, Alberto Cargnelutti Filho, Luciano Z. Pes, Jonas A. Arnemann   +14 more
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ECONOMIC INJURY LEVELS OF THE ALFALFA WEEVIL (COLEOPTERA: CURCULIONIDAE)

The Canadian Entomologist, 1973
AbstractEconomic injury levels of the alfalfa weevil on alfalfa were investigated in New York State. The dry weight food consumption for the larval stage of the alfalfa weevil averaged 7.34 mg/larva. For every gram (dry weight) of alfalfa consumed, 1.59 g (live weight) in insect tissue was produced.
Philip G. Koehler, David Pimentel
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‘Economic Injury Level’ and preventive pest control

Journal of Pest Science, 2003
Abstract Although the ‘Economic Injury Level’ (EIL) concept belongs to the keystones of IPM theory, its applicability to all pest problems is believed not to be universal. Current IPM theory claims that the EIL concept is of limited use (i) in situations where an injury-damage function cannot be established, (ii) if pest monitoring is impossible or EIL
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Calculating Economic Injury Levels for Stable Flies (Diptera: Muscidae) on Feeder Heifers

Journal of Economic Entomology, 1997
A procedure for calculating the economic injury levels for stable flies, Stomoxys calcitrans (L.), on feeder heifers was developed from reduction of average daily weight gain-stable fly population level data in 8 independent replicated experiments over 17 yr. A negative exponential was fitted to the data using nonlinear regression.
M A, Catangui, J B, Campbell, G D, Thomas, D J, Boxler   +3 more
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Calculation of Economic-injury Levels and Economic Thresholds for Pest Management

Journal of Economic Entomology, 1987
General formulas for calculating economic-injury levels and economic thresholds are presented. Terms and variables are defined, and important underlying assumptions are explicitly described. Concepts regarding scheduling and temporal dynamics are presented to assist in proper use of the formulas.
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Economic Injury Levels for Western Flower Thrips (Thysanoptera: Thripidae) on Greenhouse Cucumber

Journal of Economic Entomology, 2000
Low, medium and high densities of western flower thrips, Frankliniella occidentalis (Pergande), were established in three greenhouses at the Greenhouse and Processing Crops Research Centre, Ontario, Canada, in 1996 and 1998 to develop economic injury levels for thrips on greenhouse cucumber.
J L, Shipp, K, Wang, M R, Binns
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