Sorghum Seed Maturity Affects the Weight and Feeding Duration of Immature Corn Earworm,<i>Helicoverpa zea</i>, and Fall Armyworm,<i>Spodoptera frugiperda</i>, in the Laboratory

Soper, Alysha M.; Whitworth, R. Jeff

doi:10.1673/031.013.6701

Cited by 5 publications

(6 citation statements)

References 30 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apterous cabbage aphids were restricted to either the upper flowering canopy or a single leaf in the lower canola canopy using enclosure cages (23 cm diameter and 71 cm long; Figure A) adapted from Soper et al. (). Cages were placed on the same plant to enable direct comparison of plant location on aphid population growth, and to control for potential effects among individual plants in size or nutritional composition.…”

Section: Methodsmentioning

confidence: 99%

Feeding location affects demographic performance of cabbage aphids on winter canola

Cibils–Stewart

Sandercock

2015

Entomologia Exp Applicata

Self Cite

View full text Add to dashboard Cite

The cabbage aphid, Brevicoryne brassicae L. (Hemiptera: Aphididae), is a perennial pest that specializes on plants of the Brassicaceae family, attacking winter canola (Brassica napus L.) mainly during and after flowering. Under field conditions, cabbage aphid colonizes the upper flowering canopy. Population dynamics of aphids in the flowering canopy could be regulated by differences in either plant quality (bottom-up) or predatory (top-down) forces. The goal of our study was to determine the effect of feeding location on cabbage aphid demography. A stage-structured matrix population model was constructed for aphids restricted to reproductive or vegetative plant tissues of canola. We found that feeding location had a large impact on demography of cabbage aphid; the finite rate of increase (k AE SEM) was higher when aphids were restricted to reproductive tissues, compared to aphids feeding on vegetative tissues: 1.25 AE 0.01 vs. 1.17 AE 0.01 (leaves). Aphids confined to reproductive tissues with higher k exhibited shorter generation times (T = 14.2 AE 0.2 days) and 53-75% higher net reproductive rates (R 0 = 23.3 AE 1.7) than aphids feeding on vegetative tissues. Prospective analyses showed that there was a nymph-skewed stable stage distribution, and elasticity values revealed that k is most sensitive to changes in stasis of adults staying in the adult stage and to adult survival. Retrospective analyses indicated that variation in adult fecundity (value of 0.05) had the largest effect on population dynamics but collectively, growth of nymphal stage 2-3, 3-4, and 4 to adult accounted for most of the difference in k between the treatments. Monitoring programs should target adults and penultimate instars colonizing reproductive tissues of canola plants in the field as aphids on these plant structures contribute most to population growth.

show abstract

Section: Methodsmentioning

confidence: 99%

Feeding location affects demographic performance of cabbage aphids on winter canola

Cibils–Stewart

Sandercock

2015

Entomologia Exp Applicata

Self Cite

View full text Add to dashboard Cite

show abstract

“…En général, la diversité intra-spécifique de cette espèce végétale a montré qu'elle a une grande influence sur les performances de N. blitealis (Selvi & Muthukrishnan, 2011). Plusieurs études ont montré que les performances du développement des plusieurs espèces de l'ordre de Lépidoptères comme Spodoptera frugiperda sont fonction des espèces végétales avec lesquelles elles sont nourries (Soper et al, 2013 ;Dowd & Sattler, 2015 ;Wang et al, 2020 ;He et al, 2021). Les critères d'évaluation de performance comprennent la longévité, la fécondité, la croissance et le développement sur différentes espèces végétales (Wilmar et al, 2016).…”

Section: Discussionunclassified

Paramètres de la table de survie et dynamique des populations de la chenille défoliatrice, Noorda blitealis Walker (1859) (Lepidoptera: Crambidae), sur trois espèces du Moringa (Capparales : Moringaceae), en conditions expérimentales au Niger

Halilou

2023

AJTER

View full text Add to dashboard Cite

Noorda blitealis Walker (1859) (Lepidoptera : Crambidae) est le principal ravageur des plantes de la famille Moringaceae au Sahel et au Niger en particulier. Cependant, la bioécologie de l’insecte est encore mal connue dans la sous-région. Le présent travail avait pour objectif d’étudier les paramètres biologiques du développement de N. blitealis et la dynamique de l’infestation de ses populations dans le contexte du Niger. Les expérimentations ont été conduites au laboratoire, pour l’étude des paramètres biologiques et au terrain, en station, en ce qui concerne la dynamique de la population de N. blitealis sur trois espèces du Moringa, à savoir Moringa oleifera Lamarck, Moringa peregrina (Forskal) Fiori et Moringa stenopetala (Barker f.) Cufodontis. Les résultats de l’étude au laboratoire sur les paramètres biologiques de N. blitealis ont montré que les espèces M. oleifera et M. stenopetala sont plus favorables au développement de l’insecte par rapport à M. peregrina. En effet, les poids des larves pré-nymphes et des chrysalides issues des élevages des larves sur M. stenopetala ont été significativement plus élevés que celui de ceux provenant de l’élevage sur M. oleifera et M. peregrina. Le taux de survie des œufs jusqu’à l’âge adulte a été plus faible chez les individus issus de l’élevage sur l’espèce M. peregrina comparativement aux espèces M. oleifera et M. stenopetala. L’expérience a montré que N. blitealis a bouclé son cycle du développement sur toutes les trois espèces du Moringa testées et qu’en général a une forte capacité reproductive. La dynamique d’infestation estimée en nombre des œufs et des larves a été similaire sur les trois espèces hôtes testées sans aucune influence significative quelle que soit la période de l’année. Cependant, les périodes de l’année subdivisée en mois semblent influencer significativement le nombre d’œufs et des larves par plant ainsi que le taux de la défoliation sur toutes les espèces testées. La forte densité des populations de N. blitealis ainsi que la sévérité des dégâts ont été enregistrés pendant la période d’Octobre à Novembre.

show abstract

“…Kinzer and Henderson (1968) also found that Þrst and second H. zea instars preferred ßowering sorghum. More recently, Soper et al (2013) demonstrated that H. zea and S. frugiperda (corn strain) larvae feeding on sorghum seeds grow at equivalent rates and the soft dough stage of sorghum was most vulnerable to yield loss by these species.…”

mentioning

confidence: 99%

Sequential Sampling for Panicle Caterpillars (Lepidoptera: Noctuidae) in Sorghum

et al. 2014

View full text Add to dashboard Cite

Panicle caterpillars comprise an economically important insect pest complex of sorghum throughout the Great Plains of the United States, particularly in Kansas, Oklahoma, and Texas. The sorghum panicle caterpillar complex consists of larvae of two polyphagous lepidopteran species: the corn earworm, Helicoverpa zea (Boddie), and fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae). Sampling for panicle caterpillars in sorghum fields is usually accomplished by the beat bucket sampling technique with a fixed sample size of 30 beat bucket samples of one sorghum panicle each per 16.2 ha of field. We used Wald's sequential probability ratio test for a negative binomial distribution to develop a sequential sampling plan for panicle caterpillars. In total, 115 sorghum fields were sampled in Kansas, Oklahoma, and Texas from June to August 2010. Panicle caterpillars had an aggregated distribution of counts confirmed by Pearson's chi-square statistic for lack of fit to the negative binomial distribution for each sampled field. A sequential sampling plan was developed using a high threshold (an economic threshold) of 0.5 caterpillars per sorghum panicle, a low threshold (a safe level) of 0.20 caterpillars per panicle, and fixed error rates (alpha = 0.10 and beta = 0.05). At caterpillar densities > 0.45 and < 0.12 per panicle, the average number of panicles inspected to make a decision was less than the current recommendation of 30. In a 2013 validation test of 25 fields, the expected number of samples taken from average sample number curve was in close agreement with the number of samples required using the sequential plan (r2 = 0.93), and all fields were correctly classified when compared with a fixed sample size result. The plan improved upon current sampling recommendations for panicle caterpillars in sorghum because at known acceptable fixed error rates fewer samples were required when caterpillars are scarce or abundant, whereas more samples were required to make decisions with the same acceptable error rates when densities were near the economic thresholds.

show abstract

Sorghum Seed Maturity Affects the Weight and Feeding Duration of Immature Corn Earworm,Helicoverpa zea, and Fall Armyworm,Spodoptera frugiperda, in the Laboratory

Cited by 5 publications

References 30 publications

Feeding location affects demographic performance of cabbage aphids on winter canola

Feeding location affects demographic performance of cabbage aphids on winter canola

Paramètres de la table de survie et dynamique des populations de la chenille défoliatrice, Noorda blitealis Walker (1859) (Lepidoptera: Crambidae), sur trois espèces du Moringa (Capparales : Moringaceae), en conditions expérimentales au Niger

Sequential Sampling for Panicle Caterpillars (Lepidoptera: Noctuidae) in Sorghum

Contact Info

Product

Resources

About