Effects of Pyraclostrobin Foliar Fungicide, Corn Hybrid, and Harvest Timing on Stalk Health of Corn

Shelby, Ryan J.; Villamil, María B.; Ames, Keith A.; Bradley, Carl A.

doi:10.2134/cftm2018.02.0006

Cited by 4 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Late-season foliar disease development occurring closer to the rating date (dough through dent (R4-R5)) would have less impact on grain fill and yield response but still result in high foliar disease severity values. Furthermore, other studies that have examined the impact of VT applications of foliar fungicides have observed non-significant effects on yield when significant reductions of foliar disease were observed at greater than 5% severity in the non-treated control [9, 24–27]. Yield increases from VT fungicide applications also have been observed under low disease pressure in other studies [7, 26], and are attributed to the control of lesser foliar diseases and physiological effects caused by fungicides, such as delayed senescence [28].…”

Section: Discussionmentioning

confidence: 99%

Meta-analysis of yield response of foliar fungicide-treated hybrid corn in the United States and Ontario, Canada

et al. 2019

Self Cite

View full text Add to dashboard Cite

Background Foliar fungicide applications to corn ( Zea mays L.) occur at one or more application timings ranging from early vegetative growth stages to mid-reproductive stages. Previous studies indicated that fungicide applications are profitable under high disease pressure when applied during the tasseling to silking growth stages. Few comprehensive studies in corn have examined the impact of fungicide applications at an early vegetative growth stage (V6) compared to late application timings (VT) for yield response and return on fungicide investment (ROI) across multiple locations. Objective Compare yield response of fungicide application timing across multiple fungicide classes and calculate the probability of positive ROI. Methods Data were collected specifically for this analysis using a uniform protocol conducted in 13 states in the United States and one province in Canada from 2014–2015. Data were subjected to a primary mixed-model analysis of variance. Subsequent univariate meta-analyses, with and without moderator variables, were performed using standard meta-analytic procedures. Follow-up power and prediction analyses were performed to aid interpretation and development of management recommendations. Results Fungicide application resulted in a range of yield responses from -2,683.0 to 3,230.9 kg/ha relative to the non-treated control, with 68.2% of these responses being positive. Evidence suggests that all three moderator variables tested (application timing, fungicide class, and disease base level), had some effect (α = 0.05) on the absolute difference in yield between fungicide treated and non-treated plots ( ). Application timing influenced , with V6 + VT and the VT application timings resulting in greater yield responses than the V6 application timing alone. Fungicide formulations that combined demethylation inhibitor and quinone outside inhibitor fungicides significantly increased yield response. Conclusion Foliar fungicide applications can increase corn grain yield. To ensure the likelihood of a positive ROI, farmers should focus on applications at VT and use fungicides that include a mix of demethylation inhibitor and quinone outside inhibitor active ingredients.

show abstract

Section: Discussionmentioning

confidence: 99%

Meta-analysis of yield response of foliar fungicide-treated hybrid corn in the United States and Ontario, Canada

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fungicide use may be a consideration to minimize stalk rot and preserve stalk quality during harvest, though stalk rot will still increase if harvest is delayed appreciably (Shelby et al, 2018). Growers can minimize yield and quality losses associated with stalk lodging by harvesting fields with stalk Crop Science rot as early as possible (Paul & Thomison, 2019).…”

Section: Management Response and Recommendationsmentioning

confidence: 99%

Severe storm damage and short‐term weather stresses on corn: A review

Lindsey,

Ortez,

Thomison

et al. 2024

Crop Science

View full text Add to dashboard Cite

Adverse weather conditions from acute events (e.g., storms causing lodging, flooding, or hail) or short‐duration weather patterns (i.e., periods of cold events; extended waterlogged field conditions) can result in yield losses, though management practices may play key roles in aiding with crop recovery or avoidance of these stress events. This review summarizes current knowledge (with emphasis placed on the US Midwest) related to corn response to short‐term weather stresses of (i) cold temperature, (ii) excess water, (iii) hail/defoliation damage, and (iv) wind damage. Each section presents summaries of how corn growth and yield are affected, provides context into past events experienced, identifies agronomic or production recommendations to correct or alleviate the stress condition, and proposes areas where future research is needed. This review also highlights challenges associated with controlled simulation work on these stressors, and also identifies key areas to expand future research efforts. In general, yield losses associated with strong storms and short‐term weather events often ranged from 5% to 35%, but extreme cases could result in up to 80%–100% yield loss. Much of the literature on these topics was published prior to 1995, though it still forms the basis for modern agronomic guidance, which is problematic given the changes in agriculture in the last 20 years in management practices, available genetics and technologies, and changing environmental conditions. Revisiting these foundational studies and expanding them to examine current and future weather conditions are critical for better informing agronomic recommendations, for devising mitigation strategies, and for determining accurate yield loss expectations following these stresses.

show abstract

“…Corn lodging is usually caused by excessive planting density, improper use of fertilizer, unreasonable irrigation or diseases, and pests during the growth period ( Echezona, 2007 ; Shelby et al, 2018 ; Liu et al, 2021 ). The bending strength and rind puncture resistance of stalks are usually taken as the indices for lodging resistance in variety breeding ( Albrecht et al, 1986 ; Robertson et al, 2016 ; Seegmiller et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Measurement and Analysis of Root Anchorage Effect on Stalk Forces in Lodged Corn Harvesting

Chen

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

The effect of root anchorage on corn stalk is the main cause of difficulties in stalk lifting and ear picking of lodged corn. To quantify the forces on the stalks caused by root anchorage in corn harvesting, a root force measurement system was designed and applied in this study. The bending moment and torsional moment on the upright and lodged corn stalks were measured in corn harvesting with the designed system and the results were compared with the manually measured failure boundaries. The manually measured results showed bending moments to push down the upright stalks, to lift the lodged corn stalks, and to slip the lodged corn stalks were 35.12, 23.33, and 40.36 Nm, respectively, whereas the torsional moments needed to twist off the upright and lodged corn stalks were 4.02 and 3.33 Nm, respectively. The bending moments that the corn header applied to the upright, forward lodged, reverse lodged, and lateral lodged corn stalks were 10.68, 22.24, 16.56, and 20.42 Nm, respectively, whereas the torsional moments on them were 1.32, 1.59, 1.55, and 1.77 Nm, respectively. The bending force was the main factor that broke the root anchorage and influenced the stalk movement of lodged corn in harvesting. By analyzing the bending moment curves on the lodged corn stalks, it was proposed that for the harvesting of corn lodged in the forward, reverse, and lateral direction, the corresponding harvester header improvement suggestions are enlarging the size of pins on the gathering chains, reducing the speed of gathering chains, and lengthening the snouts with a sleeker surface, respectively. This study provides base data for the root anchorage effect on lodged corn and provides references for the improved design of the corn harvester header.

show abstract

Effects of Pyraclostrobin Foliar Fungicide, Corn Hybrid, and Harvest Timing on Stalk Health of Corn

Cited by 4 publications

References 38 publications

Meta-analysis of yield response of foliar fungicide-treated hybrid corn in the United States and Ontario, Canada

Meta-analysis of yield response of foliar fungicide-treated hybrid corn in the United States and Ontario, Canada

Severe storm damage and short‐term weather stresses on corn: A review

Measurement and Analysis of Root Anchorage Effect on Stalk Forces in Lodged Corn Harvesting

Contact Info

Product

Resources

About