Climate and host plants mediating seasonal dynamics and within-plant distribution of the diamondback moth (Plutella xylostella)

Farias, Elizeu S.; Santos, Abraão Almeida; Ribeiro, Aristides; Carmo, Daiane G.; Paes, Jhersyka da Silva; Picanço, Marcelo C.

doi:10.1016/j.cropro.2020.105172

Cited by 22 publications

(14 citation statements)

References 49 publications

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“…However, the climate plays a major role in regulating DBM dynamics. Lower values of temperature and relative humidity favour this pest, which results in higher DBM densities in winter, decreasing towards autumn (Farias et al, 2020). Our study shows how the natural mortality factors of DBM would act if this pest was equally abundant in all seasons.…”

Section: Marginal Predation Rates Vs Predator Densitiesmentioning

confidence: 74%

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Life tables for the diamondback moth (Plutella xylostella) in southeast Brazil indicate ants and spiders as leading mortality factors

Farias

Santos

Carmo

et al. 2020

Annals of Applied Biology

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The diamondback moth (DBM), Plutella xylostella (Lep.: Plutellidae), causes significant losses in Brassica crops. Leaf consumption by the larvae reduces plant yield and causes the contamination of heading brassicas. Chemical control usually provides unsatisfactory results due to the quickly developed resistance of DBM populations to insecticides. Thus, natural control by biotic factors (predators, parasitoids, and entomopathogens) is crucial and should be managed upon knowledge of their role as DBM regulators. The leading mortality factors of DBM across the annual seasons in southeast Brazil were investigated by conducting 57 field life tables for 2 years. The highest and lowest total mortalities of DBM occurred in winter (99.7%) and autumn (94%). Predation was the main mortality factor in all seasons. Marginal parasitism rates were higher in spring and lower in autumn, and Oomyzus sokolowskii (Hym.: Eulophidae) accounted for almost 90% of total parasitism. The highest mortalities by rainfall were recorded in spring (44.5%), while physiological death and infection caused low mortalities (≤ 6%) throughout the seasons. In addition, models were built to investigate the main predators acting on the DBM life stages; Araneae, Brachymyrmex bruchi, and Tetramorium simillimum (Hym.: Formicidae) were the predators associated with egg/L1 predation whereas Solenopsis saevissima, T. simillimum and Camponotus spp. (Hym.: Formicidae) were the ones responsible for L4/pupa predation. The L2/L3 stage was the least affected by predation, and the final model for this stage did not include any predator. In light of these findings, habitat manipulation and insecticide selectivity are discussed as measures to preserve the main predators and parasitoid.

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Section: Marginal Predation Rates Vs Predator Densitiesmentioning

confidence: 74%

“…We recently described how DBM populations fluctuate over the year in southeast Brazil due to the variation of weather variables (Farias et al, 2020). However, an understanding of the leading mortality factors of DBM is still lacking, especially regarding the forces regulating its population.…”

mentioning

confidence: 99%

Life tables for the diamondback moth (Plutella xylostella) in southeast Brazil indicate ants and spiders as leading mortality factors

Farias

Santos

Carmo

et al. 2020

Annals of Applied Biology

Self Cite

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“…The larva of lepidopteran pest affects almost every crop (Rose and Singh, 2010). The diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), is a major cosmopolitan lepidopteran pest in the Brassicaceae family and is oligophagous (Farias et al, 2020) with Mediterranean origin (Huaripataand Sánchez, 2019). They are adaptable to adverse weather conditions and has an excellent ability to disperse with a short life cycle (Duarte et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The larvae of diamondback moths have a chewing mouthpart (LI et al, 2018) and are voracious feeder that is continuously feeding on the leaves causing defoliation (Farias et al, 2020). It is projected that its annual management costs and associated crop losses are $4-5 billion globally (Shen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Critical Review on Past, Present and Future Scope of Diamondback Moth Management

Jamtsho¹,

Banu²,

Kinley³

2021

PLANT ARCHIVES

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Diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), has become the most destructive insect pest of Brassicaceae plants globally. Numerous control methods are available to control the moth, such as host plant resistance, physical controls, chemical controls, cultural controls, and biological controls. The continued application of insecticides has led to the development of resistance to almost 97 chemical compounds. The biological methods also became inefficient in the control of the moth. Therefore, nanotechnology would provide green and efficient alternatives for controlling the pest without harming environment. This review focuses on control methods used to manage diamondback moth and nanomaterials’ potential in insect pest management as modern nanotechnology approaches. It focuses on the past, present, and future scope of diamondback moth management

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“…2009; Farias et al . 2020). Yet despite the vast majority of the 250 000 extant Lepidopteran species occurring within tropical latitudes, most of our understanding of their ecology comes from temperate systems, especially agricultural pests from the Pieridae family (e.g.…”

Section: Introductionmentioning

confidence: 99%

Season and weather affect the mortality of immature stages ofAscia monusteorseis(Lepidoptera: Pieridae) caused by natural factors

et al. 2020

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In this study, we evaluated the causes of mortality in immature stages of Ascia monuste orseis Godart 1918 (Lepidoptera: Pieridae) over each of four seasons, for 2 years, on an experimental cabbage plot using life tables. We addressed two key questions: (1) Do the mortality rates caused by a factor vary by season? And (2) how does the local weather contribute to such variation? We identified five causes of mortality (failure, pathogens, parasitism, predation and rainfall) that together tended to be higher during wet–warm conditions with values up to 94%. However, each cause and its mortality rate varied among seasons. Failure was observed in all stages and tended to increase during cold conditions with a negative relationship with air temperature and relative humidity and positive for precipitation. Larval and pupal predation increased during warm conditions and was positively associated with both air temperature and relative humidity. Conversely, in seasons with intense precipitation, pupal predation was reduced and had a negative relationship. Rainfall caused mortality of eggs and larvae, mostly during intense events, and egg mortality also showed a positive and significant association with precipitation. Larval parasitism was low, and pathogens were noted in larvae and pupae, but we did not find variation by season for these factors. Our results indicate that mortality caused by failure, predation and rainfall on immature stages of A. monuste orseis can vary among seasons and appear to be related to local weather. These findings improve our comprehension of how local weather affects the immature stages of a neotropical pest and the associated mortality factors.

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Climate and host plants mediating seasonal dynamics and within-plant distribution of the diamondback moth (Plutella xylostella)

Cited by 22 publications

References 49 publications

Life tables for the diamondback moth (Plutella xylostella) in southeast Brazil indicate ants and spiders as leading mortality factors

Life tables for the diamondback moth (Plutella xylostella) in southeast Brazil indicate ants and spiders as leading mortality factors

Critical Review on Past, Present and Future Scope of Diamondback Moth Management

Season and weather affect the mortality of immature stages ofAscia monusteorseis(Lepidoptera: Pieridae) caused by natural factors

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