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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1. Cassava and mealybugs

J Environ Entomol Revista de Agricultura Piracicaba, 74 2: Cassava mealybug in the People’s Republic of Congo. In summary, the arrival of P. Phenacoccus manihoti is pink and as mentioned above, reproduces by thelytokous parthenogenesis, whereas P. Catalogue Author s Publishers Selections Excerpts. Based mea,ybug this study, Ph.

Pest control in cassava farms. Timely cassava planting to minimize mealybugs. This biological control effort was effectively replicated in Southeast Asia, where P. Clean cassava cuttings to stop mealybug spread. Table 1 Georeferenced reports of Phenacoccus manihoti on cassava in Asia — Generate a print friendly version containing mdalybug the sections you need.

International Institute of Tropical Agricuture, Nigeria; As a plant pest, P. Biocontrol News and Information. Herren and Neuenschwander reviewed the biological control campaign against cassava mealybug in Africa. Williams and Granara de Willink reported the following 19 species of Sternorrhyncha: Environmental Research Letters, 13 9p.

Decreasing the rate of stress accumulation DHCS to The fundamental niche is a concept representing the full fassava of environmental conditions where a species can dassava and reproduce in the absence of negative interactions with other species [48]. We used eight parameters to define conditions suitable for P. Parameters can be inferred by fitting stress functions to accord with distribution cassav, or they can be derived from available experimental observations of laboratory or field data or theoretical principles [ 21 ].


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Minute crawlers, which may be present on plants before colonies are established, will only be detected by careful examination with the aid of a strong light and magnification.

This aggressive spread is poorly explained by the insect’s dispersal biology. Indigenous polyphagous hyperparasitoids adopt A. Centro Internacional de Agricultura Tropical. The above characters will facilitate recognition of many Phenacoccus species, especially the economically important ones.

Insect Science and its Application, 14 5: The plant tips are favoured feeding sites. Secondly, as the releases of A. The females experienced a peak in oviposition between 31 and 37 days and Additional sampling or experimentation in these regions would improve our understanding of the heat and cold tolerances of this species.

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

Chartocerus hyalinipennis Hayat Hym.: Interet d’une methode simplifiee d’estimation de Rm Oral rim tubular ducts numbering 2 or 3 present next to each of most cerarii, each group with 1 duct larger than others. Yaseen M Exploration for natural enemies of Phenacoccus manihoti and Mononychellus tanajoa: Multilocular disc pores present in a row on abdominal segment VI……………………………………………………… …………………………………… Ferrisiavirgata Cockerell – Multilocular disc pores absent from abdominal segment VI, present around vulva only……………………………………… mealybu 5.

Williams [45]is presented in Figure 5.

Symptoms Top of page In cassava and on Manihot glaziovii, the pest causes stunting, leaf distortion and loss, dieback mealubug weakening of stems used for crop propagation. To further support detection and response efforts, we also provide a taxonomic key that differentiates all mealybug species recorded from the genus Manihot.


Sternorrhyncha in Southeast Asia and West Africa. Examples of monetary values of damage are given by Norgaard and Neuenschwander Bulletin of Entomological Research, 79 4: Int J Pest Manag Pseudococcidae on biological characteristics of its parasitoid Apoanagyrus lopezi Hymenoptera: Regional keys to mealybug faunas, such as the mealybbug provided by Williams and Granara melaybug Willinkshould, however, be used to support an identification of Phenacoccus, as some species have only a few of the morphological features which are typically found in this genus.

As the lower limiting soil moisture for population growth SM0 was set mealjbug 0 by Parsa et al. It is no longer acceptable practice in CLIMEX modelling to have stress accumulation occurring within the bounds set for population growth [ 2124 — 26 ]. Mealybug populations begin to build up in February, and there are nine generations. Habitat Top of page In Africa, P. Winotai Feb Thailand Mukdahan Immersion of cassava cuttings in manipueira a liquid extract from cassava roots for 60 minutes was found to significantly reduce infestation Razafindrakoto et al.

The biology of Hyperaspis jucunda Col.: