Efficacy and Profitability of Insecticide Treatments for Tomato Spotted Wilt Management on Peanut in South Carolina

Anco, Daniel J.; Thomas, James S.; Monfort, W. Scott

doi:10.1094/pdis-09-19-1829-re

Cited by 12 publications

(13 citation statements)

References 39 publications

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“…The estimated effect size of SS ij at varying seed size i was obtained using the estimate statement in GLIMMIX. The probability of increased SS ij for a given extra large seeded runner (e.g., 605 seed/lb, TUFRunner '297 [22]) in relation to a small-seeded runner (e.g., 820 seed/lb, Georgia-13M [32]) in future gradings was estimated using the intertrial standard deviation and cumulative standard-normal function following previously reported methodology [33][34][35][36]. Probabilities, p i , of SS differences in future gradings were estimated using Equation (2):…”

Section: Methodsmentioning

confidence: 99%

Sound Splits as Influenced by Seed Size for Runner and Virginia Market Type Peanut Shelled on a Reciprocating Sheller

et al. 2021

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The objective of this study was to examine peanut (Arachis hypogaea L.) kernel percent sound splits as a function of sound mature kernel seed size when shelled on a reciprocating sheller. Data were compiled from a total of 139 field experiments conducted in the Virginia-Carolina region and Georgia from 2005 to 2020. Runner and Virginia peanut market types were graded according to United States Department of Agriculture (USDA) standards using standard sheller screens with upper grid sizes corresponding to the red pan from the pre-sizer of 10.3 × 19.1 mm (26/64 × 3/4 ″) and 13.5 × 25.4 mm (34/64 × 1 ″) with minimum bar grid clearances of 8.7 (11/32 ″) and 12.7 mm (1/2 ″), respectively. A subset of runner market type samples was graded using the Virginia sheller screen. Grade data per market type and sheller screen was analyzed separately. Among runner market types shelled with the standard runner-type screen, percent sound splits increased linearly with increasing seed size at the logit rate of 1.16 per sound mature kernel g (p < 0.001). Sound splits for Virginia and runner market types shelled on the standard Virginia-type screen did not significantly vary by kernel size (p = 0.939 and 0.687, respectively). Extra-large kernels (proportion) for Virginia types linearly increased with seed size at 1.91 per sound mature kernel g (logit scale) (p < 0.001). Runner market types sized 75 to 91 g/100 sound mature kernels (605 to 500 seed/lb) were estimated to have a 50% probability of a 2.3 to 4.5% or greater increase in sound splits when shelled with the standard runner-type screen compared to runner-type seed sized 55 g/100 sound mature kernels (820 seed/lb), respectively, equivalent to a potential deduction increase of 1.8 to 4.4 USD /1000 kg. For both Virginia and runner market types, seed weight linearly increased with pod weight at 0.169 and 0.195 g/g (p < 0.001), respectively. Results from this study may be used as a reference to suggest runner-type seed sizes above which larger reciprocating sheller screen utilization in line with USDA grading practices is warranted to reduce mechanically induced sound splits during grading and subsequent economic deduction penalties for corresponding farmer stock peanut.

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Section: Methodsmentioning

confidence: 99%

Sound Splits as Influenced by Seed Size for Runner and Virginia Market Type Peanut Shelled on a Reciprocating Sheller

et al. 2021

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“…In South Carolina, Contender exhibited a high degree of susceptibility to infection by tomato spotted wilt (Anco et al 2021). Thus, although recommendations were followed to reduce development of tomato spotted wilt during these experiments (Anco et al 2020, 2021, Kemerait et al 2018, the greater susceptibility of Contender compared to other Virginia type cultivars could have contributed to a relatively lower realized yield at harvest. a Means within a column followed by the same letter are not significantly different according to Fisher's protected LSD at P < 0.05.…”

Section: Resultsmentioning

confidence: 99%

Pod Yield Production Among Peanut (Arachis hypogaea L.) Cultivars in South Carolina

Anco¹,

Hiers²

2022

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The objective of this work was to compare peanut yield production potential for runner and Virginia market type cultivars in South Carolina. Cultivar selection decisions are integrally linked to pod yield production potential of a planted field and are often based on available historic and recent yield data. To aid farmers in this process, 24 and 27 field experiments were conducted in South Carolina between 2015 and 2020 for runner and Virginia type cultivars, respectively, to examine yield production potential. Top grouping runner type cultivars consisted of Georgia-16HO, FloRun 331, TUFRunner 297, and Georgia-12Y. Virginia type cultivars within the statistical grouping with the greatest yield included Walton and Bailey II. Total sound mature kernels among runner type cultivars was greatest for Georgia-16HO and Georgia-06G, followed by TUFRunner 297, Georgia-14N, TUFRunner 511, and Georgia-18RU. Virginia type cultivars did not significantly vary with regard to total sound mature kernels in this study. Results generated from this work may be useful as a reference to help inform cultivar selection decisions.

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“…In all studies chlorothalonil at 1.26 kg ai ha -1 was included with each fungicide spray program. Chlorothalonil is the foundation of peanut leaf spot control programs because it is the only fungicide proven to have multiple modes of action to the reduce the risk of developing leaf spot resistance" [30]. "Alternating or tank mixing chlorothalonil with other fungicides can delay development of resistance towards these alternative fungicides.…”

Section: Resultsmentioning

confidence: 99%

“…"Alternating or tank mixing chlorothalonil with other fungicides can delay development of resistance towards these alternative fungicides. Chlorothalonil in the last scheduled spray can also help prevent resistant leaf spot strains from overwintering and causing infection in the following year" [30].…”

Section: Resultsmentioning

confidence: 99%

Using Inpyrfluxam to Control Peanut (Arachis hypogaea L.) Foliar and Soil-Borne Diseases

Grichar

Meador

2023

JEAI

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Aims: To determine peanut disease control and yield response to inpyrfluxam applied at various timings during the growing season. Study Design: Randomized complete block design with 4 reps. Place and Duration of Study: Field studies were conducted from 2016 through 2020 in the south Texas peanut growing region near Yoakum (29.276o N, 97.123o W). Methodology: Fungicides were applied with a CO2-propellant sprayer. The spray boom was equipped with three D2-23 hollow-cone spray nozzles per row with the middle nozzle centered over each plant in the row and another nozzle located as such to spray on each side of the plant to provide thorough coverage with a spray volume was 187 L ha-1. Some studies included a non-treated control while other studies included chlorothalonil only at 1.26 kg ha-1 as the comparison treatment. Each plot consisted of four rows spaced 97 cm apart and 7.9 m long. Results: Inpyrfluxam applied twice in a 4 to 5 fungicide spray program in combination with chlorothalonil provided early leaf spot control as good as or better than the standards of chlorothalonil plus either azoxystrobin alone or azoxystrobin plus benzovindiflupyr applied 2 times. Control of Rhizoctonia pod rot, caused by Rhizoctonia solani Kuhn, with inpyrfluxam at 0.04, 0.05. 0.075, or 0.1 kg ai ha-1 applied 2 times during the growing season was comparable to two applications of azoxystrobin at 0.22 kg ai ha-1. Control of southern blight, caused by Sclerotium rolfsii Sacc., with one to two applications of inpyrfluxam at 0.05 to 0.1 kg ha-1 was comparable to azoxystrobin plus benzovindiflupyr. Peanut yield response was influenced by the level of soilborne and foliar disease control exhibited with each fungicide program, as those programs which provided the best control also produced the highest yield. Conclusion: These studies show the ability of inpyrfluxam to provide control of multiple diseases found in southwest peanut production.

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Efficacy and Profitability of Insecticide Treatments for Tomato Spotted Wilt Management on Peanut in South Carolina

Cited by 12 publications

References 39 publications

Sound Splits as Influenced by Seed Size for Runner and Virginia Market Type Peanut Shelled on a Reciprocating Sheller

Sound Splits as Influenced by Seed Size for Runner and Virginia Market Type Peanut Shelled on a Reciprocating Sheller

Pod Yield Production Among Peanut (Arachis hypogaea L.) Cultivars in South Carolina

Using Inpyrfluxam to Control Peanut (Arachis hypogaea L.) Foliar and Soil-Borne Diseases

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