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288 results for “corn”

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zenodo36/100

Table 1 in Influence of Mycorrhizae and Irrigation on Growth and Mineral Uptake by Corn (Zea mays L.) Seedlings in a Calcareous Soil

Table 1. Chemical characteristics of Guam cobbly clay soil used in the experiment.<table><tbody><tr><th>Parameter</th><th>Unit</th><th>Value</th></tr></tbody><tbody><tr><th>pH</th><td></td><td>7.0</td></tr><tr><th>Organic Matter</th><td>g kg-1</td><td>6.4</td></tr><tr><th>P</th><td>mg kg-1</td><td>25</td></tr><tr><th>K</th><td>mg kg-1</td><td>56</td></tr><tr><th>Ca</th><td>mg kg-1</td><td>5678</td></tr><tr><th>Mg</th><td>mg kg-1</td><td>123</td></tr><tr><th>Mn</th><td>mg kg-1</td><td>5.6</td></tr><tr><th>Fe</th><td>mg kg-1</td><td>63</td></tr><tr><th>Zn</th><td>mg kg-1</td><td>0.9</td></tr><tr><th>Cu</th><td>mg kg-1</td><td>0.7</td></tr></tbody></table>

opencc-by-4.0Dec 2019View details →

zenodo36/100

Voltinism and life-history traits of the invasive fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) feeding on corn

Voltinism and life-history traits of the invasive fall armyworm (FAW) Spodoptera frugiperda were investigated under semi-natural conditions for a period of two years. The FAW invaded the corn field in the suburbs of Nanchang (28° 46′ N, 115° 50′ E) in early summer and produced six complete generations. The FAW had the characteristics of short developmental time, high survival rates and strong fecundity. The development time of female pupae was significantly faster than that of male pupae, resulting in the emergence of female pupae earlier than male pupae. Except for the sixth generation in 2021, there was no significant difference between female and male sex ratio, which was close to 1:1. The FAW showed male-bias sexual size dimorphism with male pupae being significantly larger than female pupae. Unlike pupal weight, in most generations, male adult weighed significantly less than females, because the weight loss of male pupae during metamorphosis was significantly greater than that of female pupae. The seasonal variation of pupal weight did not conform to the temperature–size rule. Compared with 22.8 °C, the 29.2 °C high temperature not only significantly reduced the development time of larvae but also significantly increased pupal weight. The adult fecundity feeding on fresh corn leaves was higher than that feeding on live corn plants in most generations. In most generations, pupal weight was positively correlated with larval development time and adult weight was positively correlated with fecundity. These results add to the understanding of the evolution of life-history traits in the FAW and may have important implications for predicting population dynamics of the FAW and optimizing control strategies.

opencc-by-4.0Jul 2023View details →

zenodo36/100

Fitness and cold tolerance of Spodoptera frugiperda fed on corn and two winter crops (Original data)

草地贪夜蛾(FAW)草地贪夜蛾是一种主要的迁徙和多噬性害虫。FAW的越冬、迁徙和定植性状与植被和寄主适应性密切相关。在这项研究中,我们调查了春夏作物(玉米)和两种冬季作物(卷心菜,芸苔属和油菜,油菜,油菜)的产卵偏好,喂养偏好,适应性和耐寒性。结果表明,FAW可以通过喂食卷心菜和油菜来完成其生命周期,尽管健康状况不如玉米。以卷心菜为食的FAW存活率、雌蛹质量和宿主适宜性指数高于油菜,幼虫更喜欢以油菜叶为食,雌性更喜欢在油菜植株上产卵。此外,与玉米和油菜相比,以卷心菜为食的FAW幼虫从寒晕中恢复的时间最短,表明以卷心菜为食可提高FAW幼虫的耐寒性。因此,卷心菜可能是FAW的理想宿主,需要在冬季生存和繁殖。研究结果提高了我们对FAW寄主选择和适应的理解,为预测FAW冬季繁殖区奠定了基础。

opencc-by-2.0Aug 2023View details →

zenodo36/100

Corn field management for wintering waterfowl on eastern Long Island, New York

The study took place in corn fields in Suffolk County, Long Island, New York, 7 February – 4 April 2018 and 7 February – 10 April 2019 (Fig.1). Fields were planted for typical production corn with 15.2 cm (6 inch) spacing among plants in rows 30.5 cm (12 inch) apart. Suffolk County contains coastal wetlands, freshwater ponds, and rural landscapes where corn fields are available to wintering waterfowl. Seasonal corn yield and wildlife abundance were determined at two corn fields in 2018 and 2019 (Cutchogue [41.023 ° N, -72.511° W] and Orient Point [41.141° N, -72.278° W]) and included another corn field in 2019 (Brookhaven [40.798° N, -72.891° W]). Corn fields were divided into three sections and marked them with flagging to identify them from a distance. The mean (± SE) corn field size was 4.08 ± 0.20 ha (Cutchogue = 3.99 ha, [0.87 ha, 1.33 ha, and 1.79 ha sections]; Orient = 4.47 ha, [1.46 ha, 1.46 ha, and 1.55 ha sections]; Brookhaven = 3.78 ha, [1.26 ha, 1.26 ha, and 1.26 ha sections]). Corn field samples were taken to obtain an index of corn availability and corn depletion rates following Barney [8]. One section in each field was chopped with a brush-hog every 2 weeks until all three sections in a field were chopped. Section of standing corn were sampled once the day before chopping and after chopping once every two weeks in 2018 and weekly in 2019. Sampling was adjusted to weekly in 2019 because some sections were depleted to zero or near zero kg/ha in < 2 weeks during 2018. A random sampling design was used to distribute samples throughout the field. Main transects (n = 3) were established perpendicular to the field edge in each section of a field (evenly spaced 20 − 26 m apart). Each sampling period, a random number generator was used to select sampling points along each main transect. The same number of samples were taken along each main transect (n = 4; n = 12 per section). A random number generator was used to determine the left or right direction of samples to be taken off of the main transect along a perpendicular transect. A random number generator was used to determine the distance of the sampling point along the perpendicular transect (between 1 – 10 m). Corn was sampled using a 1 m × 1 m quadrat at each sampling point and all corn within each quadrat was collected and placed in marked plastic bags. All individual kernels, cobs full of kernels, and cobs partial covered in kernels were included in the sample and frozen within 4 hrs of sampling. In the lab, corn was thawed, kernels were removed from cobs, and samples were dried at 60℃ until a constant mass at 48 hrs and weighed to ± 0.1 g, and reported as kg/ha. Wildlife surveys were conducted at each field 8 February – 3 April 2018 and 8 February – 9 April 2019. Morning and evening surveys were conducted, switching the time of survey at each field weekly. Morning surveys occurred 30 min before to 2 h after sunrise and evening surveys were 2 h before to 30 mins after sunset. To survey two fields on the same day, one field was surveyed in the morning and another field in the evening following weekly protocol for switching survey times. Each field was surveyed 3 times per week. Observation points were adjusted accordingly to maximize clear line of site when each section was chopped. Waterfowl flew into and landed in fields during sunrise and sunset surveys. Canada geese that were in fields at the start counts were included. This scenario reduced error in counting and identifying waterfowl to species, so 100% detection was assumed. For each field, total number of waterfowl, species composition, and other wildlife were recorded. Other wildlife included blackbirds (Icteridae), white-tailed deer (Odocoileus virginianus), and wild turkeys (Meleagris gallopavo).

opencc-byAug 2023View details →

ClinicalTrials.gov36/100

The Impact of Legumes vs Corn-soy Flour on Environmental Enteric Dysfunction in Rural Malawian Children 6-11 Months

ClinicalTrials.gov study NCT02472262. IPD Sharing: Not stated. Countries: 1. Publications: 6.

restrictedIPD-UNDECIDEDFeb 2026View details →

ClinicalTrials.gov36/100

Effect of Soluble Corn Fiber Supplementation for 1 Year on Bone Metabolism in Adolescents

ClinicalTrials.gov study NCT02916862. IPD Sharing: YES. Countries: 1. Publications: 1.

controlledIPD-YESFeb 2026View details →

dryad36/100