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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 model is also temporally explicit, and could therefore be instrumental in the design and planning of early detection programs.

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In this article, we use an integrative modeling approach to predict P. There is always a possibility that a species not included in the key may be found feeding on cassava, thus the following key should be used with caution.

Our rationale for this choice is that our distribution data for P. The most important predators are coccinellids, e. Ovisacs are sticky and can adhere to clothing, facilitating long-distance mealybug dispersal.

Diagnosis In life, species pinkish, covered in a white mealy secretion, with tufts of flocculent waxy secretion at posterior end and around margins Fig. Neuenschwander P; Madojemu E, James B, Fofanah M.

Hutchinson GE Concluding remarks. Cassava production and pest management: Ants attending mealybugs for their honeydew are known to defend the pests from natural enemies that would otherwise attack them.

Annales de la Societe Entomologique de France, 22 1: Also, wet stress WSor rainfall mortality, explains predicted unsuitability across much of the wet tropics in Indonesia and the Philippines Fig.

This is also apparently the case for P. Yaseen M Exploration for natural enemies of Phenacoccus manihoti and Mononychellus tanajoa: Encyrtidae into the Congo in Specimens used to verify the key are reported in bold in Table 1. Mitteilungen der Schweizerischen Entomologischen Gesellschaft, 59 Abstract Phenacoccus manihoti Matile-Ferrero Hemiptera: Identification of suitable legumes in cassava Manihot esculenta Crantz -Legumes intercropping.


Winotai Sep Thailand Saraburi Agents used for biological control of mealybugs Pseudococcidae. Environmental Research Letters, 13 9p.

El piojo harinoso de la yuca, Phenacoccus manihoti Hemiptera: Pseudococcidaein Malaysia. Parasitoids introduced into Indonesia: We started with the parameter values Mealybu 1 published by Parsa et al. Observations on cassava mealybugs in the Americas; their biology, eco logy and natural enemies. The life cycle consists of an egg and four instar stages with the fourth being the adult mealybug.

cassava mealybug (Phenacoccus manihoti)

Ventral multilocular disc pores present on abdomen only, in medial areas, not reaching margins. Impact assessment of the biological control of the cassava mealybug, Phenacoccus manihoti Matile-Ferrero Hemiptera: Although it has been collected on plants in various families, such as citrus and tomato, there is no evidence that it can survive for more than one generation on plants other than Manihot and perhaps mealybugg other Euphorbiaceae Williams and Granara de Willink, Tania Yonow1, 2 Darren J.

Fig 3B highlights the areas at potential biosecurity risk from P. Crawlers move actively within the plant, cassva to upper leaf surfaces from where they easily get blown away by wind. It may be advisable for plant quarantine services to regulate trade in fresh planting material of cassava from Casssva and tropical South American countries to other tropical countries.

1. Cassava and mealybugs

Cassava Manihot esculenta is a food staple for millions of people worldwide, and is especially important in Africa, which accounts for half of the global production [ 1 ]. Four additional parameters SM0—SM3 csssava the moisture optima and bounds for growth, in proportional units of soil water holding capacity.


Groups of tubular ducts are present around the dorsal margins as in P. Furthermore, cassava can be grown on poor soils, mealybut easily propagated and relatively inexpensive to produce [ 2 ]. Sustained biological control of the cassava mealybug Phenacoccus manihoti Hom.: James, ; James and Fofanah, ; Zeddies et al.

Pseudococcidae and Putoidae with data on geographical distribution, host plants, biology and economic importance. Entomologia Experimentalis et Applicata, 42 2: This is to ensure that we give you the best experience possible.

Chartocerus hyalinipennis Maelybug Hym.: Pseudococcus longispinus Targioni Tozzetti -Oral rim tubular ducts next to any cerarius absent or present singly, of 1 size only.

Cassava-Mealybug interactions – 1. Cassava and mealybugs – IRD Éditions

Normally the dorsal multilocular pores around the margins are more numerous in P. Insect eradication can be achieved with insecticide or biopestide treatments designed to eliminate the pest from a delimited area [52][56]. Relationships between cassava root yields and crop infestations by the mealybug, Phenacoccus manihoti.

Kondo Nov Thailand Rayong Population numbers drop at the onset of the rainy season, when many mealybugs are washed off the plant. Results from this article should help decision-makers assess site-specific risk of invasion, and develop proportional prevention casssva surveillance programs for early detection and rapid response. Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 99 2: