Outbreak of two New Cassava Pests (<i>Mononychellus tanajoa</i>and<i>Phenacoccus manihoti</i>) in Southwestern Nigeria

Akinlosotu, T. A.; Leuschner, K.

doi:10.1080/09670878109413658

Cited by 13 publications

(5 citation statements)

References 2 publications

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“…The pest can attack cassava and may lead to yield reduction of about 21, 25 and 53% during a 3, 4 and 6 months attack i.e 73% for susceptible varieties and 15% for the resistant varieties [24]. M. tanajoa severely make damage to cassava up to an estimate of 80% throughout the African continent [25]; [15]. Similarly, the potential for yield loss or reduction by these pests is greater than the cyclical pests like hornworms which cause sporadic defoliation [24].…”

Section: Counts Damagementioning

confidence: 99%

Response of Some Cassava Varieties to Mononychellus tanajoa Bondar. (Tetrachynidae: Acarina) Infestation in the Lake Zone, Tanzania

Wudil

Rwegasira

Kudra

et al. 2016

JAERI

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The study was aimed to determine the responses of 9 commercial and local cassava varieties to M. tanajoa and the environment in two different seasons (2014/2015, wet and dry) in the lake Zone. This was laid out in a Split plot design with varieties as sub plots and locations as main plots. Three field trials were conducted at three different locations, Ukiruguru (Latitude 020 43.156' S, Longitude 0330 01.431' E and elevation of 4000 m above sea level) N'gombe (Latitude 020 45.743' S, Longitude 0330 01.838' E and elevation 3888 m above sea level) and Kishiri (Latitude 020 48.694' S, Longitude 0330 22.161' E and elevation 4023 m above sea level) villages of Kwimba and Misungwi districts of Mwanza, respectively. These were replicated three times making a total of twenty seven plots. The treatments were allocated to a plot size of 36 m 2 with 1 m path (boarder) Original Research Articlebetween plots and 2 m between blocks. One stem cutting (30 cm long) was planted at a spacing of 1x1 m within and between rows giving a total of 10,000 plant population ha -1. This was allowed under natural infestation by the mites. The results indicated that the mites population and damage generally varied significantly (P= 0.05) among varieties, sampling dates and locations. In general, Kwimba recorded the highest population number of M. tanajoa while Ukiruguru had the highest root yield and number. The study shows that Kyaka appeared to be tolerant/resistant to cassava green mite while Liongo Kwimba, Naliendele, Suma and Namikonga were found to be most susceptible, respectively. Therefore, cassava varietal resistance has a significant effect on the population dynamics and damage of M. tanajoa in the Lake Zone, Tanzania.

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Section: Counts Damagementioning

confidence: 99%

Response of Some Cassava Varieties to Mononychellus tanajoa Bondar. (Tetrachynidae: Acarina) Infestation in the Lake Zone, Tanzania

Wudil

Rwegasira

Kudra

et al. 2016

JAERI

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“…With the introduction and spread of P. manihoti, however, the arthropod fauna on cassava rapidly increased in abundance and complexity. During this period, entomologists in Congo (Matile-Ferrero, 1977;Fabres & Matile-Ferrero, 1980), Zaire (PRONAM, 1978), Nigeria (Akinlosotu & Leuschner, 1981;Iheagwam, 1981;Akinlosotu, 1982), Senegal (Bhatnagar, 1984) and Gabon (Boussienguet, 1986) compiled lists of the new insects on cassava and noted, in some cases, their ecological roles.…”

Section: Introductionmentioning

confidence: 99%

Food web of insects associated with the cassava mealybug,Phenacoccus manihotiMatile-Ferrero (Hemiptera: Pseudococcidae), and its introduced parasitoid,Epidinocarsis lopezi(De Santis) (Hymenoptera: Encyrtidae), in Africa

Neuenschwander

Hennessey

Herren

1987

Bull. Entomol. Res.

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About 130 species of parasitoids and predators are reported, most of them for the first time, to be associated directly or indirectly with the cassava pest Phenacoccus manihoti Matile-Ferrero and its parasitoid, Epidinocarsis lopezi (De Santis), newly introduced into Africa as a biological control agent. About 20 species are common. The species are grouped in 11 guilds, which include the indigenous hyperparasitoids, which originally attacked parasitoids of other mealybugs, the predators with which E. lopezi competes for the same food source and their antagonists.

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“…M. tanajoa was first observed in West Africa, in Nigeria, in 1979 (Akinlosotu & Leuschner, 1981). Based on damage symptoms described on cassava near Benin City in south-western Nigeria, Nyiira (19826) speculates that it may have been present in Nigeria as early as 1976.…”

Section: Discovery and Spread In Africamentioning

confidence: 99%

Introduction and spread of the cassava green mite,Mononychellus tanajoa(Bondar) (Acari: Tetranychidae), an exotic pest in Africa and the search for appropriate control methods: a review

Yaninek

Herren

1988

Bull. Entomol. Res.

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Mononychellus tanajoa (Bondar), a spider mite new to Africa, was discovered on cassava in Uganda in 1971. This exotic mite of Neotropical origin has since spread to 27 countries, causing an estimated 13-80% reduction in cassava yield. The history of its introduction and spread in Africa is reported, and present knowledge on the taxonomy, biology, ecology and pest status of the mite, and the evolution of strategies to control it are reviewed. While attempts have been made to control M. tanajoa, it remains a serious pest in most areas. The prospects for classical biological control as an appropriate control strategy are discussed.

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Outbreak of two New Cassava Pests (Mononychellus tanajoaandPhenacoccus manihoti) in Southwestern Nigeria

Cited by 13 publications

References 2 publications

Response of Some Cassava Varieties to Mononychellus tanajoa Bondar. (Tetrachynidae: Acarina) Infestation in the Lake Zone, Tanzania

Response of Some Cassava Varieties to Mononychellus tanajoa Bondar. (Tetrachynidae: Acarina) Infestation in the Lake Zone, Tanzania

Food web of insects associated with the cassava mealybug,Phenacoccus manihotiMatile-Ferrero (Hemiptera: Pseudococcidae), and its introduced parasitoid,Epidinocarsis lopezi(De Santis) (Hymenoptera: Encyrtidae), in Africa

Introduction and spread of the cassava green mite,Mononychellus tanajoa(Bondar) (Acari: Tetranychidae), an exotic pest in Africa and the search for appropriate control methods: a review

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