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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Annales de cassvaa Societe Entomologique de France, 13 1: Tsacas L; Chassagnard MT, Mededelingen van de Faculteit Landbouwwetenschappen, Rijksuniversiteit Gent, 53 3a: Its accidental introduction damaged cassavs staple crop that is particularly important in times of drought, during a time of drought, leading to famine More Ants attending mealybugs for their honeydew are known to defend the pests from natural enemies that would otherwise attack them.

This approach revealed the anomalies in the model of Parsa et al [ 23 ].

Organic Chemical Control Immersion of cassava cuttings in manipueira a liquid extract from cassava roots for 60 minutes was found to significantly reduce infestation Razafindrakoto et al.

Revue de Zoologie Africaine, 95 4: It has spread in Africa to practically all countries where cassava is grown, in a broad belt from West through to East Africa and down to the eastern edge of South Africa. Nwanze KF Relationships between cassava root yields and crop infestations by the mealybug, Phenacoccus manihoti.


How to cite this article. Cassava mealybug in the Mealbug Republic of Congo. The accidental introductions of two cassava pests from South America the cassava mealybug, Phenacoccus manihotiand the cassava green mite, Meallybug tanajoa have resulted in serious losses in cassava production as neither of these pests faced the competition and parasitoids of their native range.

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

Phenacoccus manihoti – Wikipedia

Winotai Aug Thailand Chon buri Pseudococcidaein Zambia. Soon LG, Moekchantuk T. The average generation period T of this species was Journal of Pest Science.

CMB – first successful releases. Evaluation of insecticides for control of cassava mealybug Phenacoccus manihoti. A location record may arise in a situation that is not representative of the long-term mealyug averages.

You can suggest to your library or institution to subscribe to the program OpenEdition Freemium for books. With confirmation that this area is indeed not suitable for P. Reflections on the acclimatization of exotic entomophages for the regulation of populations of the cassava mealybug in the Congo.

On a daily basis, fecundity of the adult females was determined by removing and counting the eggs present under the females using a stereoscopic microscope.

Biological characteristics of the cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae)

Additionally, pest-infested plants produce poor quality stem cuttings for use as planting material. By contrast, the mechanistic or deductive approach estimates its climatic preferences based on laboratory experiments [25].

A comparison of systems to analyse potential weed distributions In: After this period, oviposition decreased mealybuf 17 eggs per female in the subsequent two days. Egg incubation lasts approximately 8 days and the insect usually dies days after it ceases egg production Nwanze, Oral rim tubular ducts usually absent from dorsum.


Evaluating the efficacy of biological control of three exotic homopteran pests in tropical Africa. An illustration of P.

1. Cassava and mealybugs

The mealybugs were observed on a daily basis until their life cycle was completed and information on the time of molting and mortality was recorded for each life stages. As with Kriticos et al. In the early s, the cassava mealybug P. Variation mealybbug abundance and regulatory factors of the cassava mealybug Phenacoccus manihoti Hom.: Int J Trop Insect Sci 8: In so doing, we bring new insights into the potential spread of this invasive insect, enabling us to identify potential bio-security threats and biological control opportunities.

Pseudococcidae with a description of a new species. However, the embryonic development of this species was shorter 6. In most countries the mealybug caused severe damage by stunting the growth points of cassava plants, sometimes totally defoliating the plants. Heat stress, an index of mortality caused by intolerable heat. Biological control of the cassava mealybug, Phenacoccus manihoti Hom.

Canadian Entomologist, 6: