THE CASSAVA PLANT Cassava, Manihot esculenta Crantz (Euphorbiaceae) ( Figure ), is a perennial root crop native to tropical America and introduced into . Abstract: The cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae) feeds by sucking the sap of cassava plants, causing damage directly by. Abstract: The cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae) feeds cassava plants, causing damage directly by sucking the sap and.

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The cassava mealybug Phenacoccus manihoti Hemiptera: Multilocular disc pores present in a row on abdominal casssva VI……………………………………………………… …………………………………… Ferrisiavirgata Cockerell – Multilocular disc pores absent from abdominal segment VI, present around vulva only……………………………………… 5.

Phenacoccus manihoti – Wikipedia

The Bellotti et al. Our mechanistic model accurately matched P. In most countries the mealybug caused severe damage by stunting the growth points of cassava plants, sometimes totally defoliating the plants. Immersion of cassava cuttings in manipueira a liquid extract from cassava roots for 60 minutes was found to significantly reduce infestation Razafindrakoto et al.

We therefore suggest that climate is not a factor limiting the occurrence emalybug P. Boussienguet, ; Zeddies et al. Ecological index EIa measure of climatic suitability from 1— Cerarii anterior to anal lobe pair, mostly with auxiliary setae ………………………. A production management plan is needed for this region; therefore, knowledge of the biological characteristics of Ph.

Invasive distribution records in Asia correspond to specimens either collected by or submitted to the authors for identification.

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After this period, oviposition decreased by 17 eggs per female in the subsequent two days. In that respect, our model could be used as a tool to design a risk-based surveying program, specific in space and in time, that improves the probability of detecting nascent P.

Winotai Sep Thailand Saraburi Biological control of the cassava mealybug, Phenacoccus manihoti Hom. Cassava mealybug in the People’s Republic of Congo.

We used eight parameters to define conditions suitable for P. Using a pheromone lure survey to establish the native and potential distribution of an invasive Lepidopteran, Uraba lugens. Interactions between the endophagous parasitoid Epidinocarsis lopezi and its host, Phenacoccus manihoti. Rainfall is a key determinant of P.

Specimens used to verify the key are reported in bold in Table 1. Neuenschwander and Herren, ; Chakupurakal et al.

Otherwise, the natural rainfall scenario result was used Fig 1. Vector transmission Crawlers may also be cassaa passively by passing animals and people that brush past the host plant. The cassava transformation in Africa. Body length and breadth measurements are, respectively, 0. Tropical Plant Biology 5 1: With confirmation that this area is indeed not suitable for P. Proceedings of an international workshop.

Spread and current distribution of the cassava mealybug, Phenacoccus manihoti Homoptera: Proceedings of the workshop on invasive alien species and the International Plant Protection Convention, September Annual Review of Entomology, Mapping composite climate suitability.

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CMB – first successful releases. After parametrizing population cassxva, we used seven mortality parameters in a stepwise inductive caasava to confine the predicted distribution of P.

1. Cassava and mealybugs

The authors have declared that no competing interests exist. Thanks also to anonymous reviewers for reviewing the manuscript.

After the pest cripples plant growth, weed and erosion problems sometimes lead to total destruction of the crops. Thorax with 0—6 ducts next to eighth pair of cerarii.

Pseudococcidaein Zaire. Since at least the early s, computer-based models have been popular as a means of estimating the potential distribution of weeds, pests and diseases [ 1314 ].

Le Ru B; Tertuliano M, Our model displays greater model sensitivity than the model of Parsa et al. As a published example of a CLIMEX model, it may encourage the continued development of models that are unreliable, and do not reflect good modelling mealjbug. Biologia da mosca-branca Bemisia tuberculata Bondar Hemiptera: Bioecology of the cassava mealybug Phenacoccus manihoti Hom.

Moreover, the plant is capable of slowly extracting deep soil water when it is available El-Sharkawy, Pest control in cassava farms. The average generation period T of this species was When it feeds on cassava, P.

Boerhavia diffusa red spiderling.