A system dynamics model for pests and natural enemies interactions

Sokame, Bonoukpoè Mawuko; Tonnang, Henri E. Z.; Subramanian, Sevgan; Bruce, Anani Y.; Dubois, Thomas; Ekesi, Sunday; Calatayud, Paul‐André

doi:10.1038/s41598-020-79553-y

Cited by 24 publications

(10 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Field surveys recorded higher FAW numbers (eggs and larvae) than combined numbers of cereal stemborers, both native ( B. fusca and S. calamisitis ) and exotic C. partellus on maize plants. Although surveys conducted just at the beginning of FAW invasion in Kenya revealed a possible co-existence of FAW with stemborers [ 13 , 59 ], our results demonstrate that within an approximately four-year period since its invasion in Kenya, FAW has become the dominant lepidopteran pest species in local maize fields where they cohabitate with stemborers. Before FAW invasion, stemborers were the dominant lepidopteran pests in maize fields in Kenya, with C. partellus being dominant in low-altitude zones, while B. fusca dominated the high-altitude zones [ 60 , 61 , 62 ].…”

Section: Discussionmentioning

confidence: 60%

Agronomic Factors Influencing Fall Armyworm (Spodoptera frugiperda) Infestation and Damage and Its Co-Occurrence with Stemborers in Maize Cropping Systems in Kenya

Mutyambai

Niassy

Calatayud

et al. 2022

Insects

Self Cite

View full text Add to dashboard Cite

Fall armyworm (FAW), Spodoptera frugiperda J.E Smith, (Lepidoptera: Noctuidae) is a serious invasive pest of maize that has been established in Kenya since 2016. Little is known about its co-occurrence with resident stemborers, relative infestation and damage and how agronomic factors influence its infestation and damage in maize cropping systems across different agro-ecological zones. This study assessed FAW co-occurrence with resident stemborers, relative infestation and damage across three agro-ecological zones, and the effects of different agronomic practices on its infestation and damage in maize cropping systems in Kenya. A total of 180 maize farms were surveyed across three different agro-ecological zones. FAW infestation and damage was highest in lowlands compared to mid-altitude and high-altitude lands. Its population (eggs and larvae) dominated that of resident stemborers in maize fields. Maize grown under mixed cropping systems, with rainfed production and weeded frequently had low infestation and damage compared to those grown under monoculture, with irrigation and no weeding, respectively. Young vegetative maize plants were more infested and damaged compared to mature plants. Different maize varieties were found to have different infestation and damage levels with Pioneer having the least damage. These results demonstrate that agronomic practices play a role in influencing FAW infestation and damage in maize cropping systems. Further, the population of FAW is dominating that of stemborers in maize cropping systems in Kenya, four years after its invasion. Thus, agronomic practices need to be considered while designing sustainable agro-ecological-based management solutions for resource-constrained smallholder farmers.

show abstract

Section: Discussionmentioning

confidence: 60%

Agronomic Factors Influencing Fall Armyworm (Spodoptera frugiperda) Infestation and Damage and Its Co-Occurrence with Stemborers in Maize Cropping Systems in Kenya

Mutyambai

Niassy

Calatayud

et al. 2022

Insects

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been shown for parasitoids that the invasion of S. frugiperda was reported to have a negative effect on parasitoids especially decrease the parasitism rate of stem borers (Sokame et al 2021b). This is due to the abundance of parasitoids that may follow the abundance of pests (Sokame et al 2021a). This pattern accepts the hypothesis that interaction diversity is linked to the Lotka-Volterra prey-predator system, which is the positive correlation between pest abundance and natural enemies (Boukal and Krivan 1999).…”

Section: Effect Of S Frugiperda Invasion On Attack Intensity Of Native Lepidopteran Pests and Diversity Of Natural Enemiesmentioning

confidence: 60%

“…Besides the effect on economic loss, the invasion of S. frugiperda may also affect native biodiversity. In Africa, the infestation of S. frugiperda can affect the native biodiversity by reducing both native insect pests and other insect communities (Sokame et al 2021b;Sokame et al 2021a). Larvae of S. frugiperda have the ability to compete (intraspecies competition) and predate other larvae (cannibalism) (Chapman et al 2000;Ren et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Invasion of fall armyworm Spodoptera frugiperda, a new invasive pest, alters native herbivore attack intensity and natural enemy diversity

et al. 2021

View full text Add to dashboard Cite

Abstract. Rizali A, Oktaviyani, Putri SDPS, Doananda M, Linggani A. 2021. Invasion of fall armyworm Spodoptera frugiperda, a new invasive pest, alters native herbivore attack intensity and natural enemy diversity. Biodiversitas 22: 3482-3488. A new invasive alien pest, fall armyworm Spodoptera frugiperda has been reported widely spread in Indonesia since 2019 and can cause a serious problem in maize cultivation. Its invasion of new habitat may severely impact not only maize production but also native biodiversity including other native pests. This research was aimed to investigate the effect of S. frugiperda invasion on the attack intensity of native herbivores as well as the diversity of natural enemies in maize fields. Field research was conducted in twelve maize fields spread across the district of Malang, Kediri, and Batu, East Java, Indonesia. In each maize field, sampling of S. frugiperda and other insects was conducted by the hand-picking method within four transects with each transect consisting of 100 plants. The results found five species of lepidopteran pests including S. frugiperda, Ostrinia furnacalis, Helicoverpa armigera, Mycalesis sp, and Chrysodeixes sp. S. frugiperda was found with higher attack intensity than other lepidopteran pests. Based on the analysis, the attack intensity of S. frugiperda had a positive relationship with pesticide application and was marginally correlated with plant age and elevation. The infestation of S. frugiperda significantly reduced the attack intensity of other lepidopteran pests as well as the diversity of natural enemies, especially predators. Two native species of parasitoid wasps, Telenomus sp and Mymaridae sp were recorded parasitizing the eggs of S. frugiperda. In conclusion, the infestation of S. frugiperda causes biotic homogenization in the maize field by directly compete with other lepidopteran pests and indirectly eliminate the natural enemy diversity.

show abstract

“…This gives an advantage of FAW over maize stemborers resulting of an overall reduction in stemborer density generally observed in maize elds in Kenya at the beginning of the season (Sokame et al 2021a), a displacement of some of them to other cereals in Uganda (Hailu et al 2021). However, the speci city of FAW to feed on leaves and stemborers to plant stems in late instars might result in the co-existence fall armyworm with stemborer species in maize agroecological zones (Sokame et al 2020(Sokame et al , 2021b. Therefore, the invasion of FAW in Africa constitutes an additional pest to crops in agroecosystems that need to be considered within the context of integrated pest management strategies.…”

Section: Discussionmentioning

confidence: 99%

Cannibalism and intraguild predation involved in the intra- and inter-specific interactions of the invasive fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) and lepidopteran maize stemborers

Sokame

Musyoka

Mohammed

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Intra- and interspecific competitions play important role in determing spread and survival/death (cannibalism or intraguild predation) of organisms which share the same resource. However, the trends of relation between cannibalism and intraguild predation, and the costs and benefits of such behaviours are difficult to establish within insect communities and a little is known about how such behaviours are affected by invasive species. The present study was aimed at assessing the interactions between larvae of fall armyworm (Spodoptera frugiperda) and maize stemborers (Busseola fusca, Sesamia calamistis and Chilo partellus) in relation to cannibalism and intraguild predation when they are subjected to utilize the same resource. Experiments involving treatments with either single species of S. frugiperda or any of the stemborers or pairwise species combinations were conducted under laboratory conditions. The experimental insect larvae were reared on maize leaves and monitored until the last developmental stage where larval survival, mortality, and cannibalism and/or intraguild predation were recorded. Results of the intra-specific interaction indicated that S. frugiperda exhibited cannibalism to a larger degree than the stemborers species, especially at the late instars stages. The higher cannibalism trait in S. frugiperda turned however to competitive advantage as it led to a higher degree of intraguild predation when they cohabit with other stemborer species. Overall, interaction with S. frugiperda is thus detrimental for the stemborer species and may be an important factor to explain the invasive success of the pest. Such knowledge is essential in designing successful integrated pest management strategies.

show abstract

A system dynamics model for pests and natural enemies interactions

Cited by 24 publications

References 46 publications

Agronomic Factors Influencing Fall Armyworm (Spodoptera frugiperda) Infestation and Damage and Its Co-Occurrence with Stemborers in Maize Cropping Systems in Kenya

Agronomic Factors Influencing Fall Armyworm (Spodoptera frugiperda) Infestation and Damage and Its Co-Occurrence with Stemborers in Maize Cropping Systems in Kenya

Invasion of fall armyworm Spodoptera frugiperda, a new invasive pest, alters native herbivore attack intensity and natural enemy diversity

Cannibalism and intraguild predation involved in the intra- and inter-specific interactions of the invasive fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) and lepidopteran maize stemborers

Contact Info

Product

Resources

About