Sequential Sampling Plans for Colorado Potato Beetle (Coleoptera: Chrysomelidae) in Eggplant

Hamilton, George C.; Lashomb, James H.; Arpaia, Salvatore; Chianese, Robert; Mayer, Mark

doi:10.1093/ee/27.1.33

Cited by 14 publications

(6 citation statements)

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“…However, optimal sample size for a Þxed precision level demanded a considerable effort, particularly for low larval densities. Taking into account a desired accuracy of 0.25, used by several authors in similar studies (e.g., Southwood 1978, Walker and Allsopp 1993, Hamilton et al 1998, the sampling effort needed for mean values around the economic threshold (10 larvae/sample) was Ϸ22 samples for both models. Alternatively, sequential sampling plans lead to a reduction in sampling effort when compared with Þxed precision models.…”

Section: Discussionmentioning

confidence: 99%

“…The parameter k was calculated using the maximum likelihood method (Sherrer 1984), and the Þtness of the sample data to the negative binomial model was examined by the 2 test for goodness-of-Þt (Zar 1996). We also estimated dispersion indices using TaylorÕs power law (s 2 ϭ a ϫ m b ), which relates variance to mean density, where a is a scaling factor related to sample size and b is a measure of aggregation (Taylor 1961, Southwood 1978, Ho 1993, Walker and Allsopp 1993, Hamilton et al 1998. We obtained least-squares estimates of a and b by regressing s 2 on m using the following function: logs 2 ϭ b logm ϩ loga.…”

Section: Methodsmentioning

confidence: 99%

“…The required reliability of the estimated density can be set as a fraction of the sample mean, D, usually ranging from 0.10 to 0.25 in terms of pest management programs (Southwood 1978, Walker and Allsopp 1993, Hamilton et al 1998. We used values of D ranging from 0.1 to 0.4, following Ho (1993).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Sampling Plans for <I>Pseudaletia unipuncta</I> (Lepidoptera: Noctuidae) Larvae in Azorean Pastures

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Vieira

Tavares

2003

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Sampling Plans for <I>Pseudaletia unipuncta</I> (Lepidoptera: Noctuidae) Larvae in Azorean Pastures

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2003

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“…An estimated 72.5 million kilograms of eggplant were grown in 2010, and eggplant consumption in the United States (US) has trended higher over the past five decades (ERS 2011). Unlike short season crops, which have volatile seasonal values, eggplant provides Northeast US farmers with constant capital throughout the growing season (Hamilton et al 1998). However, eggplant in the Northeast is colonized by various insect defoliators such as the Colorado potato beetle (Leptinotarsa decemlineata Say), blister beetles (Epicauta spp.…”

Section: Introductionmentioning

confidence: 99%

The effects of crimson clover companion planting on eggplant crop growth, yield and insect feeding injury

Hooks

Hinds

Zobel

et al. 2013

International Journal of Pest Management

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The effect of using crimson clover (CC) (Trifolium incarnatum L.) as a companion plant on crop growth, marketable yield and insect feeding injury was examined using Eggplant, Solanum melongena L. as the neighbouring cash crop. There were two subplot treatments, which included applications of organic insecticides and no insecticides. Planting eggplant directly into CC did not improve most eggplant growth variables and resulted in a yield reduction during year 1. During year 2, when the CC was strip-tilled prior to transplanting the eggplant, several eggplant growth variables were more strongly enhanced in CC than bare-ground (BG) habitats. Eggplant in CC plots suffered less damage by insect folivores but yields were similar among treatments. There were no benefits of using organic insecticides with respect to increased marketable yields in CC treatment plots, but there was an increase in marketable yield in sprayed compared with unsprayed BG subplots. If properly managed, CC may help protect eggplant from insect feeding injury; however, this may not cause an increase in marketable yield.

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“…They overwinter in the soil as adults, emerge in the spring, and start feeding and ovipositing on host plants. Although potato (Solanum tuberosum L.) is known as an important host, CPB can cause severe damage to other domesticated plants such as tomato (Solanum lycopersicum L.) and eggplant (Solanum melongena L.) (Jansson et al 1989;Arpaia et al 1996;Lu et al 1997;Hamilton et al 1998). Considerable field research has been devoted to developing integrated pest management (IPM) programmes for CPB in potato fields but to a lesser extent in eggplant agroecosystems.…”

Section: Introductionmentioning

confidence: 99%

Impact of crimson clover dying mulch on two eggplant insect herbivores

Hooks

Hinds

Zobel

et al. 2012

J Applied Entomology

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Eggplant Solanum melongena L., is often colonized by two early season insect defoliators. The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), and flea beetles Epitrix spp., emerge from their overwintering sites in early spring and seek out emerging host plants such as eggplant. During the 2009 and 2010 growing season, field studies were conducted to investigate the impact of inter‐planting eggplant into a crimson clover (CC), Trifolium incarnatum L., winter cover crop on populations of flea beetles, CPB and their associated arthropod predators. The experiment consisted also of two levels of insecticide usage such as an application of azadirachtins plus pyrethrins followed by several applications of spinosad or no insecticide sprays as subplot treatments. During both study years, significantly fewer (adults, larvae and egg masses) were found on eggplant inter‐planted into CC than in bare‐ground (BG) eggplant plots. Although flea beetle abundance was greater in BG eggplant during 2010, they appeared to be less influenced by the presence of CC than were CPB. Additionally, there was no apparent impact of insecticide treatment on CPB populations on eggplant inter‐planted into CC. However, there was a decline in CPB following treatments with insecticides in BG eggplant plots. This suggests that a winter cover crop such as CC can be used to help manage CPB in eggplant, however, using this tactic in tandem with insecticide sprays may not result in greater CPB management.

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Sequential Sampling Plans for Colorado Potato Beetle (Coleoptera: Chrysomelidae) in Eggplant

Cited by 14 publications

References 0 publications

Sampling Plans for <I>Pseudaletia unipuncta</I> (Lepidoptera: Noctuidae) Larvae in Azorean Pastures

Sampling Plans for <I>Pseudaletia unipuncta</I> (Lepidoptera: Noctuidae) Larvae in Azorean Pastures

The effects of crimson clover companion planting on eggplant crop growth, yield and insect feeding injury

Impact of crimson clover dying mulch on two eggplant insect herbivores

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