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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In this species, the first instar is also the most mobile stage P. Neuenschwander P; Gutierrez AP, IITA Research, 1 1: Entomologia Experimentalis et Applicata, 85 2: Open in a separate window. Yaseen M Exploration for natural enemies of Phenacoccus manihoti and Mononychellus tanajoa: Analysis of biological control of cassava pests in Africa. We increased the value of PDD to obtain the correct number of generations 9 recorded in Brazzaville [ 40 — 42 ]. Within a few years meaylbug these first reports, the insect became the major cassava pest and spread rapidly through most of the African cassava belt.

Phenacoccus manihoti – Wikipedia

Embrapa Cassava and Fruits, C. Pseudococcidaein southwestern Nigeria. Additionally, pest-infested plants produce poor quality stem cuttings for use as planting material.

As with Kriticos et al. Life-table studies on Epidinocarsis lopezi DeDantis Hym. Observations on cassava mealybugs in the Americas; their biology, eco logy and natural enemies.


Cultural Control Use of manure or other fertilizers can result in a casswva in the mealybug population because improved nutrition results in the production of larger parasitoid wasps with higher fertility levels Schulthess et al.

If you would like to, you can learn more about the cookies we use. First record of cassava mealybug, Phenacoccus manihoti Hemiptera: More modern tools used for molecular analysis have shown them to be genetically diverse, however. Insect pest of cassava. 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 ].

Number of degree-days for a feneration PDD We increased the value of PDD to obtain the correct number of generations 9 recorded in Brazzaville [ 40 — 42 ].

The coccinellid Czssava notata is associated with the mealybugs P. A as a composite of natural rainfall and irrigation based on the irrigation areas identified by Siebert et al. Groups of tubular ducts are present around the dorsal margins as in P. A location record may arise in a situation that is not representative of the long-term climate averages.

Predictions are based on the ecological index EIa measure of climatic suitability scaled from 1—, for locations within CLIMEX’s station database.

Field biology of the cassava mealybug, Phenacoccus manihoti, and its natural enemies in Zaire. In re-fitting the CLIMEX model we consider the role of irrigation explicitly, thereby avoiding the distortion of parameters and the simulated phenology of P. Our mechanistic model accurately matched P.


Akinlosotu and Leuschner, ; Zeddies et al. Title Second, third and fourth instars Caption Phenacoccus manihoti cassava cazsava ; second, third and pre-ovipositing fourth instars feeding on cassava.

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Parameter values for population growth were assigned so as to allow stress indices to explain a greater proportion of EI. Modelled climate suitability for Phenacoccus manihoti under natural rainfall conditions. Experimental evaluation of the efficacy of Epidinocarsis lopezi, a parasitoid introduced into Africa against the cassava mealybug Phenacoccus manihoti.

Distribution Maps Top of page You can pan and zoom the map. The highest predicted suitability within cassava-growing regions in Asia is found within the southern end of Karnataka in India, the eastern end of the Ninh Thuan province in Vietnam, and in most of West Timor in Indonesia.

Pseudococcidae in Congo, five years after the introduction of Epidinocarsis lopezi Hymenoptera: Laboratory and field parasitism by Epidinocarsis Apoanagyrus lopezi Hym.: No mealybug has been reported as causing damage on cassava in Asia.