Durée de psychose non traitée en Afrique : cas des patients hospitalisés à l'Hôpital national de Niamey

Maiga, Djibo Douma; Seyni, Houdou; Sidikou, Amadou; Abdou, Moussa; Oumarou, Mariama Hama

doi:10.3917/inpsy.8908.0661

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…In 2017, African countries experienced between USD 2.4 billion to USD 6.1 billion in crop loss due to this species. FAW has also been recorded on other important food crops in Africa including sorghum and millet [11,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Performance of Two Trichogrammatid Species from Zambia on Fall Armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Sun

Nkunika

et al. 2021

Insects

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The fall armyworm, Spodoptera frugiperda (J.E. Smith), is a noctuid moth native to the tropical and subtropical Americas that has successfully invaded Africa and Asia, where it is has become a serious threat to food security as a pest of cereals and other crops. Biological control is an environmentally friendly means of combating the pest and contributes to an integrated pest management approach. In our study, two egg parasitoid species (Trichogramma mwanzai and Trichogrammatoidea lutea) found in parasitized fall armyworm eggs in Zambia were identified by using a combination of both molecular and morphological characteristics. To evaluate their potential and efficiency on 0- to 2-day-old fall armyworm eggs, we compared their parasitism capabilities with three Trichogramma species native to China (T. ostriniae, T. leucaniae and T. japonicum) under laboratory conditions. The results showed that both parasitoid species would accept 0-, 1- and 2-day-old fall armyworm eggs, and complete their development successfully. Trichogramma mwanzai and T. lutea preferred parasitizing 0- and 1-day-old eggs over 2-day-old eggs. Trichogrammatoidea lutea females supplied with fall armyworm eggs produced the highest parasitism rate of host eggs among the five tested species, while T. mwanzai had the shortest developmental time on all test age eggs. In general, T. lutea was the best performing of the five species when reared on fall armyworm eggs, while T. japonicum was the worst. There were no significant differences, however, in percent emergence in the five test species when reared on fall armyworm eggs.

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Section: Introductionmentioning

confidence: 99%

Performance of Two Trichogrammatid Species from Zambia on Fall Armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Sun

Nkunika

et al. 2021

Insects

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“…It became a serious pest mainly to maize, with early estimates in 2017 reporting yield losses of up 20.6 m tons in just 12 maize-producing countries [ 2 ]. Additionally, FAW attacks many other important food crops including sorghum and millet in Africa [ 3 , 4 , 5 , 6 ]. This damage has created problems all over Africa, leading to emergencies and responses by farmers with unproven efficacy, such as the application of ash, sand, botanical extracts, and other locally available materials [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Parasitism of Locally Recruited Egg Parasitoids of the Fall Armyworm in Africa

Laminou

Ba²,

Karimoune³

et al. 2020

Insects

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The fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), is an insect native to the tropical and subtropical Americas that has recently spread to Africa, where it predominately attacks maize, sorghum and other plant species. Biological control is an environmentally friendly way of combatting the pest and contributes to an integrated pest management approach. In Africa, several trichogrammatid parasitoids and Telenomus remus Nixon (Hymenoptera: Platygastridae) have been found parasitizing eggs of the FAW. In Niger, the egg parasitoids encountered include Trichogrammatoidea sp. (Hymenoptera: Trichogrammatidae) and Telenomus remus Nixon. Parasitism of the FAW eggs by the two egg parasitoids was assessed in the laboratory, followed by field testing on sentinel eggs. In the laboratory, T. remus parasitized on average 78% of FAW eggs, compared to 25% for Trichogrammatoidea sp. Telenomus remus was able to parasitize egg masses that were fully covered with scales, while Trichogrammatoidea sp. parasitized only uncovered egg masses. On-farm releases of T. remus in sorghum fields caused up to 64% of FAW egg parasitism. Parasitized eggs yielded viable progeny, which can contribute to FAW egg parasitism build-up during the cropping season. Our findings lay the groundwork for the use of T. remus in augmentative releases against FAW in Africa.

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Durée de psychose non traitée en Afrique : cas des patients hospitalisés à l'Hôpital national de Niamey

Cited by 2 publications

References 8 publications

Performance of Two Trichogrammatid Species from Zambia on Fall Armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Performance of Two Trichogrammatid Species from Zambia on Fall Armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Parasitism of Locally Recruited Egg Parasitoids of the Fall Armyworm in Africa

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