Development and Validation of a Fixed-Precision Sequential Sampling Plan for Aster Leafhopper (Homoptera: Cicadellidae) in Carrot

O’Rourke, P. K.; Burkness, E. C.; Hutchison, W. D.

doi:10.1093/ee/27.6.1463

Cited by 15 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Southwood (1978) suggested that a precision level of 0.25 is adequate for management activities; when higher precision is desired, a level of 0.1 may be considered more adequate. This is different from the fixed-precision sequential sampling plan developed in this study and from others in the literature, where the minimum number of samples needed decreases with increasing population densities (Naranjo and Flint 1994;Boeve and Weiss 1998;O'Rourke et al 1998;Burkness and Hutchison 1998). Desired precision, available resources such as personnel, and the remoteness of sampling locations may dictate the level of sampling that can be reasonably accomplished.…”

Section: Discussioncontrasting

confidence: 63%

“…More recently, studies have been conducted in agricultural systems to develop fixed-precision sequential sampling plans that estimate mean population densities of the target organism at specified precision levels (expressed as the ratio of standard error to mean) (Boeve and Weiss 1998;O'Rourke et al 1998;Burkness and Hutchison 1998;Badenhausser 1996;Heinz and Chaney 1995;Naranjo and Flint 1994;and other references cited in those studies). With fixed-precision plans, sampling is terminated when estimation of the population density is accomplished with a desired precision level.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

TAXONOMIC NOTES ON THE GENUS MONELLIOPSIS (HEMIPTERA: APHIDIDAE: CALAPHIDINAE) WITH DESCRIPTIONS OF THREE NEW SPECIES

Quednau

2000

Can Entomol

View full text Add to dashboard Cite

The Canadian Entomologist 132: 119 -133 (2000) The Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, attacks Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco (Pinaceae), throughout western North America. Periodic outbreaks cause increased mortality of its host. Land managers and forest health specialists often need to determine population trends of this insect. Bark samples were obtained from 326 trees distributed over 21 stands during a 2year period in late winter to early spring of 1997 and 1998 in the Colorado Front Range. The variance to mean relationship of brood adults was examined using the Taylor power law, and a fixed-precision sampling plan was developed using Green's method. Stop lines and minimum number of samples required to estimate brood adult density per 0.046 m2 with precision levels of 0.1, 0.2, and 0.3 were calculated. A resampling simulation conducted with an independent data set indicated that desired precision levels were not met. Theoretical precision levels were adjusted until desired precision levels were achieved. Average number of samples needed to estimate brood adult densities up to 25.1 adults per 0.046 m2 with precision levels of 0.09, 0.2, and 0.3 were 91, 20, and 8, respectively. For densities greater than 25.1 brood adults per 0.046 m2, conservative estimates are obtained with 72, 15, and 6 samples for precision levels of 0.09, 0.2, and 0.3, respectively. An emergence ratio can be obtained by dividing the estimated density of brood adults by twice the number of gallery starts. This system provides the user with an immediate assessment of the population trend of Douglas-fir beetle. The data collected compare favorably with data from other Douglas-fir beetle outbreaks reported in the literature. The use of this plan outside the Colorado Front Range, or by sampling at a different height, should be cautioned until additional data from other locations and sampling heights are examined. Negron JF, Schaupp WC, Johnson E. 2000. Mise au point et validation d'un plan d'tchantillonnage sCquentiel i precision prt-Ctablie pour l'estimation de la densite des adultes i l'tmergence chez le Dendroctone du Douglas, Dendroconus pseudotsugae (Coleoptera : Scolytidae). The Canadian Entomologist 132 : 119-133. (0,02) et 6 (0,03) Cchantillons ont Ct C obtenues.Un rapport B 1'Cmergence peut Ctre calculC en divisant la densit6 estimCe d'adultes par deux fois le nombre de galeries commencCes. Ce systkme fournit B I'utilisateur une estimation immCdiate de la tendance demographique du dendroctone. Ces donnCes se comparent favorablement B celles obtenues au cours d'CvidCmies de dendroctones mentionnCes dans la littCrature. L'utilisation de ce plan en dehors de cette chaine de montagnes, ou I'Cchantillonnage B d'autres hauteurs est B dCconseiller si I'on n'obtient pas d'abord des donnCes additionnelles sur d'autres IocalitCs et hauteurs d'Cchantillonnage. [Traduit par la RCdaction] . Taylor's power law. Environmental Entomology 27: 191-201 Wald A. 1947. Sequential analysis. New York: Wiley Volume 132...

show abstract

Section: Discussioncontrasting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

TAXONOMIC NOTES ON THE GENUS MONELLIOPSIS (HEMIPTERA: APHIDIDAE: CALAPHIDINAE) WITH DESCRIPTIONS OF THREE NEW SPECIES

Quednau

2000

Can Entomol

View full text Add to dashboard Cite

show abstract

“…The use of resampling for validation of sampling plans has been effective for pests in a diversity of systems, including forage crops (Hutchison et al, 1988), row crops (Hodgson et al, 2004), vegetable crops OÕRourke et al 1998), and stored grains (Subramanyam et al, 1997). We are unaware of this resampling approach being used to validate a sampling plan for a natural enemy.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution and fixed-precision sampling plans for the ladybird Harmonia axyridis in sweet corn

2006

View full text Add to dashboard Cite

To improve the utilization of the multicolored Asian lady beetle, Harmonia axyridis (Pallas), as a natural enemy in integrated pest management (IPM) programs for sweet corn, Zea mays L., fixed-precision enumerative sequential sampling plans for this coccinellid were developed and validated. Data were collected from sweet corn plots during 2000 to 2004, with means ranging from 0.02 to 11.83 H. axyridis (larvae and adults combined) per plant. TaylorÕs power law parameters from the regression of log variance versus log mean suggested an aggregated distribution for larvae and the combined count of larvae and adults in sweet corn. For IPM purposes, a plan was developed for H. axyridis larvae and adults to provide a desired precision level of 0.25 (SEM/mean), resulting in an average sample number of 65 whole plants. However, for the purposes of ecological or applied research (with desired precision = 0.10), an average sample number of 205 plants was necessary.

show abstract

“…The contrast between statistically based sampling plans versus practical scouting recommendations is not unusual. A fixedprecision sampling plan for aster leafhopper, Macrosteles quadrilineatus Forbes (Hemiptera: Cicadellidae), in carrot, Daucus carota (L.) (Apiales: Apiaceae), estimated that 86 ten-sweep sample units and 5 ten-sweep sample units were required to estimate low (<0.17 M. quadrilineatus per sweep) and high (≥0.17 M. quadrilineatus per sweep) leafhopper densities, respectively, at a precision level of 0.25, compared with an extension recommendation of a total 100 sweeps (O'Rourke et al 1998). In cotton, 88 sample units of 25 sweeps were estimated as necessary to reach a precision level of 0.30 for a density of one stink bug per 25 sweeps, but no sample size recommendation was available previously (Reay- Jones et al 2009).…”

Section: Required Sample Size For Population Estimatesmentioning

confidence: 99%

Spatial Patterns and Sequential Sampling Plans for Estimating Densities of Stink Bugs (Hemiptera: Pentatomidae) in Soybean in the North Central Region of the United States

DiFonzo

Finke

Hunt

et al. 2019

Journal of Economic Entomology

View full text Add to dashboard Cite

Stink bugs are an emerging threat to soybean (Fabales: Fabaceae) in the North Central Region of the United States. Consequently, region-specific scouting recommendations for stink bugs are needed. The aim of this study was to characterize the spatial pattern and to develop sampling plans to estimate stink bug population density in soybean fields. In 2016 and 2017, 125 fields distributed across nine states were sampled using sweep nets. Regression analyses were used to determine the effects of stink bug species [Chinavia hilaris (Say) (Hemiptera: Pentatomidae) and Euschistus spp. (Hemiptera: Pentatomidae)], life stages (nymphs and adults), and field locations (edge and interior) on spatial pattern as represented by variance–mean relationships. Results showed that stink bugs were aggregated. Sequential sampling plans were developed for each combination of species, life stage, and location and for all the data combined. Results for required sample size showed that an average of 40–42 sample units (sets of 25 sweeps) would be necessary to achieve a precision of 0.25 for stink bug densities commonly encountered across the region. However, based on the observed geographic gradient of stink bug densities, more practical sample sizes (5–10 sample units) may be sufficient in states in the southeastern part of the region, whereas impractical sample sizes (>100 sample units) may be required in the northwestern part of the region. Our findings provide research-based sampling recommendations for estimating densities of these emerging pests in soybean.

show abstract

Development and Validation of a Fixed-Precision Sequential Sampling Plan for Aster Leafhopper (Homoptera: Cicadellidae) in Carrot

Cited by 15 publications

References 0 publications

TAXONOMIC NOTES ON THE GENUS MONELLIOPSIS (HEMIPTERA: APHIDIDAE: CALAPHIDINAE) WITH DESCRIPTIONS OF THREE NEW SPECIES

TAXONOMIC NOTES ON THE GENUS MONELLIOPSIS (HEMIPTERA: APHIDIDAE: CALAPHIDINAE) WITH DESCRIPTIONS OF THREE NEW SPECIES

Spatial distribution and fixed-precision sampling plans for the ladybird Harmonia axyridis in sweet corn

Spatial Patterns and Sequential Sampling Plans for Estimating Densities of Stink Bugs (Hemiptera: Pentatomidae) in Soybean in the North Central Region of the United States

Contact Info

Product

Resources

About