Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of Scirtothrips dorsalis (Thysanoptera: Thripidae) in Florida Blueberry

Panthi, Babu; Renkema, Justin M.; Lahiri, Soumendra N.; Liburd, Oscar E.

doi:10.3390/insects12030256

Cited by 7 publications

(7 citation statements)

References 27 publications

(49 reference statements)

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“…Understanding the distribution of an insect pest in field situations is essential for the design of an IPM program ( Brenner et al 1998 , Liebhold and Gurevitch 2002 ) and sampling plan developments ( Taylor 1984 , Binns et al 2000 , Southwood and Henderson 2016 ). In addition, knowledge of pest distribution of an insect population is essential in developing sampling plans in particular because factors responsible for variation in pest distribution differ within the field and at landscape and regional scales ( Ayalew et al 2008 , Panthi et al 2021 ). During winter, P. xylostella exhibited no discernible changes in temporal distribution with low density throughout the season.…”

Section: Discussionmentioning

confidence: 99%

“…Sampling plans are multipurpose decision-making tools used in IPM for the accurate estimation of pest populations in the field ( Panthi et al 2021 ) to avoid unnecessary insecticide application. The use of these plans typically requires fewer samples and lesser time to estimate pest populations compared to whole-field scouting methods of sampling ( Southwood and Henderson 2016 ).…”

Section: Introductionmentioning

confidence: 99%

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Distribution and fixed-precision sampling plans for diamondback moth (Lepidoptera: Plutellidae), on winter–spring cabbage

Forbanka,

Stemele,

Heshula

et al. 2023

Journal of Economic Entomology

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The diamondback moth (Plutella xylostella L.) is the most destructive insect pest on cabbage (Brassica oleracea var. capitata L.). Infestation by this pest usually results in the indiscriminate use of insecticides by farmers due to a lack of sampling plans for this pest. Sampling plans for P. xylostella management decisions on winter–spring cabbage in the Eastern Cape Province of South Africa were developed, through population monitoring that comprised weekly counts of immature stages of P. xylostella on 60 plants for 11 wk each during the winter and spring seasons. The mean density–variance relationship was used to describe the distribution of the pest, and number of infested plants was used to develop a fixed-precision sampling plan. All plant growth stages preceding maturation were vulnerable to P. xylostella damage resulting in yield losses. A high aggregation of P. xylostella on cabbage was observed in spring than in winter. The average sample number to estimate P. xylostella density within a 15% standard error of the mean was 35 plants. Furthermore, the estimated plant proportion action threshold (AT) was 51% with density action thresholds of 0.50 and 0.80 for spring and winter, respectively. Fitting P. xylostella cumulative counts in the winter and spring sampling plans resulted in 100% and 45% reduction in insecticide treatments. The similarity of sample size and ATs between both seasons provides evidence that a single sampling plan is practical for all cabbage growing seasons. The similarity of the estimated ATs to those acceptable in established integrated pest management programs indicates reliability.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution and fixed-precision sampling plans for diamondback moth (Lepidoptera: Plutellidae), on winter–spring cabbage

Forbanka,

Stemele,

Heshula

et al. 2023

Journal of Economic Entomology

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“…It is not uncommon that pest population distributions are temporally stable in cropped fields (Fitzgerald et al 2008;Reay-Jones 2017;Ghahramani et al 2019;Panthi et al 2021). Cyclamen mite is dispersed by plant trade, and the likely method of introduction into strawberry fields is from infested transplants (Dana and Oatman 1962).…”

Section: Discussionmentioning

confidence: 99%

The temporal distribution of cyclamen mite, Phytonemus pallidus (Acari: Tarsonemidae), in strawberry and comparison of sampling methods

2022

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Cyclamen mite, Phytonemus pallidus (Banks) (Acari: Tarsonemidae), is a pest of strawberry, Fragaria × ananassa Duchesne (Rosaceae), that injures new growth, resulting in damage to leaves and fruit. The primary source of cyclamen mite in strawberry is infested planting material, and damaged plants tend to occur in small, isolated patches in perennial production systems. In the present study, we determined through repeated sampling of strawberry plants in Ontario and Saskatchewan, Canada whether relative cyclamen mite population levels were stable in commercial fields and whether overwintering and field renovation (mowing) affected populations. In Ontario, cyclamen mite counts were significantly correlated for 66% (10 of 15) of the paired comparisons from six sampling dates in more than one year, indicating a relatively stable distribution of cyclamen mite patches in strawberry fields. Winter caused high mortality (100 times fewer mites in spring than fall) and mowing caused some mortality (10 times fewer mites post- than pre-mow). We found that more cyclamen mite motiles were extracted from plant material stored in ethanol and triple-washed than were extracted using Berlese funnels, although counts from leaves were correlated between methods. No cyclamen mites were found in Saskatchewan. Knowing that cyclamen mite patches are local and spread is negligible will facilitate targeted applications of controls.

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“…Determinations of the types and spatial distribution parameters are critical for the development of sequential sampling plans [ 24 ]. In the evaluations of the effectiveness of control measures, this method has been widely reported in the research on agricultural and forestry pests, such as Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) in Florida blueberry [ 25 ], Citrus aphids (Hom., Aphididae) on two orange species [ 26 ], and Mesoplatys ochroptera Stål (Coleoptera: Chrysomelidae) on Sesbania [ 27 ]. However, there has been no effort to develop a fixed-precision sequential sampling plan for the sympatric Tomicus species infesting P. yunnanensis .…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution Pattern and Sampling Plans for Two Sympatric Tomicus Species Infesting Pinus yunnanensis during the Shoot-Feeding Phase

Chen

Yang

et al. 2023

Insects

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Tomicus minor (Hartig) and Tomicus yunnanensis Kirkendall and Faccoli are two sympatric species that infest Pinus yunnanensis (Franchet) in southwest China, contributing to growth losses. Accurate sampling plans are needed to make informed control decisions for these species. We investigated three pine forests within experimental sites in Yuxi, Yunnan province, China from 2016 to 2018. The spatial distribution patterns of two pine shoot beetles during the shoot-feeding phase were determined using Taylor’s power law. The optimum sample sizes and stop lines for precision levels of 0.25 and 0.10 were calculated. The model was validated using an additional 15 and 17 independent field datasets ranging in density from 0.06 to 1.90 beetles per tree. T. minor and T. yunnanensis adults showed aggregated spatial distributions. For T. minor, sample sizes of 41 and 259 trees were adequate for a D of 0.25 and 0.10, respectively, while for T. yunnanensis, a mean density of one individual per tree required sample sizes of 33 plants (D = 0.25) and 208 plants (D = 0.10). The software simulations of this sampling plan showed precision levels close to the desired levels. At a fixed-precision level of 0.25, sampling is easily achievable. This sampling program is useful for the integrated pest management (IPM) of two sympatric Tomicus species.

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Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of Scirtothrips dorsalis (Thysanoptera: Thripidae) in Florida Blueberry

Cited by 7 publications

References 27 publications

Distribution and fixed-precision sampling plans for diamondback moth (Lepidoptera: Plutellidae), on winter–spring cabbage

Distribution and fixed-precision sampling plans for diamondback moth (Lepidoptera: Plutellidae), on winter–spring cabbage

The temporal distribution of cyclamen mite, Phytonemus pallidus (Acari: Tarsonemidae), in strawberry and comparison of sampling methods

Spatial Distribution Pattern and Sampling Plans for Two Sympatric Tomicus Species Infesting Pinus yunnanensis during the Shoot-Feeding Phase

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