Comparison of Two Different Statistical Methods for Assessing Insecticide Efficacy in Small Plot Trials Targeting Wireworms, Limonius californicus (Mannerheim) (Coleoptera: Elateridae), in Potato

Lojewski, Jeffrey; Wenninger, Erik J.

doi:10.1007/s12230-019-09748-1

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…This is a positive result according to Castillo, et al [21]. Lojewski and Wenninger [22] affirmed that the family Elateridae presents the wireworm (Coleoptera: Elateridae) as an insect that lives in the soil.…”

Section: Resultsmentioning

confidence: 92%

Gangia Index (Ϫ) of Beta Diversity and Biomathematical Equations Applied to Quantify the Agroecological Multifunctional Entropy: Macrofauna Observed in Agroecosystems of Nicaragua

Gonzalez

Pohlan²,

Centeno

2022

Ca J Agri Crop

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The multifunctional diversity in agroecosystems must be studied from systemic and comprehensive approaches of non-parametric analysis. This article provides a new beta diversity index and biomathematical equations that quantify the agroecological multifunctional entropy of biodiversity. Ten agroecosystems were studied in: Boaco, Carazo, Chinandega, Estelí and Matagalpa. Agroecosystem approaches were conventional versus agroecological. The organisms captured were at 25 points per agroecosystem, for a total of 225 points. The macrofauna surface was identified over 3.1416 m2, in the center a soil monolith of 0.01875 m3 was explored. The data of the analysis required three visions: the first vision is abundance and functional richness forming the Gangia index by inductive method. The second vision is applying antiderivatives together with the Cartesian plane. The third vision is obtaining a global score. In the agroecosystems, 44 families of macrofauna were observed, 32 of them exerted negative functionality: Scarabaeidae, Chrysomelidae, Elateridae, Formicidae and Gryllidae. The families with positive functionality were 12: Lumbricidae, Sthaphylinidae, Rhynotermitidae and Theridiidae. The most important negative function was phytophagous. The positive functions in order of taxonomic richness were: detritivores, predators, omnivores and soil engineers. With the antiderivatives by taxonomic family, polygonal areas were created. The Boaco´s agroecosystems obtained the largest polygonal area with 735 384.5027 u2. The Gangia index of beta diversity was always higher where a greatest number of taxonomic families prevailed exerting positive functions. The Boaco´s agroecosystems obtained the highest value of the Gangia index of beta diversity with 13.72 points.

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Section: Resultsmentioning

confidence: 92%

Gangia Index (Ϫ) of Beta Diversity and Biomathematical Equations Applied to Quantify the Agroecological Multifunctional Entropy: Macrofauna Observed in Agroecosystems of Nicaragua

Gonzalez

Pohlan²,

Centeno

2022

Ca J Agri Crop

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“…Power analysis can be used to calculate the minimum sample size required to detect an effect of a given size. The approach used in this study and outlined by Stroup (1999) has been used in a wide range of research including Wireworms, (Limonius californicus (Mannerheim) (Coleoptera: Elateridae)), a balsam fir forest, dairy nutrition and fish community composition (Bilotta et al 2016;D'Orangeville et al 2013;Kononoff and Hanford 2006;Lojewski et al 2019). When the data from this study was used to estimate the number of replications within a location and the number of locations required to detect significant treatment differences in grain yield the results varied between fungicide and N rate (Table 6).…”

Section: Power Of Detection Related To Replication and Locationmentioning

confidence: 99%

Response of annual canarygrass (Phalaris canariensis L.) to nitrogen fertilizer and fungicide applications

2022

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Annual canarygrass (Phalaris canariensis L.) is a specialty crop grown in Canada and the harvested grain is primarily used to feed wild and domesticated bird species. A field experiment was conducted at 5 locations in both 2012 and 2013 to study the response of annual canarygrass development and grain yield to the combined effects of fungicide (propiconazole + trifloxystrobin) and nitrogen (N) fertilizer and to determine the minimum number of site-years required to detect these effects. The experimental design was a split plot with fungicide application (none or fungicide) as the main plot and N application rate as the sub plot (10, 20, 30, 50, 70, 90 kg N ha-1). There was a linear increase of 14.5% in grain yield as the rate of N fertilizer increased. The fungicide application increased the grain yield 8.5% by increasing kernel density from 15,197 kernels m-2 to 16,288 kernels m-2. There was no interaction between the N rate and fungicide application. The application of a fungicide did not increase the responsiveness of annual canarygrass to N fertilizer. The lack of an interaction between N and fungicide application indicates that these two practices can be managed independently by annual canarygrass producers. To optimize grain yield producers should apply 50 kg N ha-1 and apply a fungicide to increase grain yield especially in regions where septoria leaf mottle is prevalent. The number of site years needed to consistently detect the impact of N and fungicide on the grain yield were 4 and 5 site-years, respectively.

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Comparison of Two Different Statistical Methods for Assessing Insecticide Efficacy in Small Plot Trials Targeting Wireworms, Limonius californicus (Mannerheim) (Coleoptera: Elateridae), in Potato

Cited by 2 publications

References 38 publications

Gangia Index (Ϫ) of Beta Diversity and Biomathematical Equations Applied to Quantify the Agroecological Multifunctional Entropy: Macrofauna Observed in Agroecosystems of Nicaragua

Gangia Index (Ϫ) of Beta Diversity and Biomathematical Equations Applied to Quantify the Agroecological Multifunctional Entropy: Macrofauna Observed in Agroecosystems of Nicaragua

Response of annual canarygrass (Phalaris canariensis L.) to nitrogen fertilizer and fungicide applications

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