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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Winotai Aug Thailand Nakhon Ratchasima Spatial predictions adequately match the known distribution map for P. Winotai Nov Thailand Chon Buri When the plants had eight fully developed leaves, they were used for the experiment according kealybug the methodology described by Rheinheimer et al.
Results from this article should help decision-makers assess site-specific risk of invasion, and develop proportional prevention and surveillance programs for early detection and rapid response.
In Africa, this crop is mostly cultivated as a staple by peasant farmers, whereas in Asia and South America meealybug is also grown on a large scale for starch, fodder and fuel. Responding to this concern, casswva present the first records of P. With a temperature threshold mechanism of Heat Stress HSone would generally expect the rate of stress accumulation to be relatively high: Immersion of cassava cuttings in manipueira a liquid extract from cassava roots for 60 minutes was found to significantly reduce infestation Razafindrakoto et al.
Pseudococcidae on biological characteristics of its parasitoid Apoanagyrus lopezi Hymenoptera: Hence, a single immature or adult may be sufficient to start an outbreak. Biocontrol News and Information. James BD; Fofanah M, Conceived and designed the experiments: Iziquel Y; Ru Ble, Bennett F, Greathead U, editors. The maximum rate of population growth is when the lines of specific fertility m x and survival rate l x intersect in a graph.
1. Cassava and mealybugs
The cassava mealybug Phenacoccus manihoti in Asia: On the other hand, P. Ibadania Niger, Nwanze KF, Movement in cassaga currents and transportation of infested stem planting material by man are the main methods by which the insect is dispersed over long distances.
Neuenschwander P; Ajuonu O, It mealybgu no longer acceptable practice in CLIMEX modelling to have stress accumulation occurring within the cassqva set for population growth [ 2124 — 26 ].
Cultural Control Use of manure or other fertilizers can result in a reduction in the mealybug population because improved nutrition results in the production of larger parasitoid wasps with higher fertility levels Schulthess et al.
Effects of neem Azadirachta indica kernel water extracts on cassava mealybug, Phenacoccus manihoti Hom.
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Finally, containment involves managing the spread of invasion either by reducing dispersal, reducing population growth or a combination of both . Sternorrhyncha in Southeast Asia and West Africa. Biocontrol Science and Technology, 1 4: IITA Research, 1 1: Las cochinillas cazsava evaluaron diariamente, registrando el tiempo de muda y la mortalidad de las ninfas y la fecundidad y la longevidad de las hembras adultas.
For this reason, studies on the most common cultivated varieties in the region are needed.
Bulletin of Entomological Research, 71 2: The mealybug nymphs were examined on a daily basis; information on molting time was recorded and mealybkg on mortality and oviposition were used to construct a fertility life table. Iheagwam EU The influence of temperature on increase rates of the cassava mealybug Phenacoccus manihoti Mat.
Biological characteristics of the cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae)
Cuervo and colleagues confirmed the placement of P. A comparison of systems to analyse potential weed distributions In: The first authoritatively-verified specimens of P. Spread and current distribution of the cassava mealybug, Phenacoccus manihoti Homoptera: Influence of hyperparasitism on populations of the encyrtid Epidinocarsis lopezi, a parasitoid of Phenacoccus manihoti introduced into the Congo.
Phenacoccus manihoti has three nymphal stages with average durations of 6. Search inside the book. Int J Trop Insect Sci 8: Please consider upgrading your browser to the latest version or installing a new browser. Hernandez Jan Vietnam Dong Nai Additionally, pest-infested plants produce poor quality stem cuttings for use as planting material.
Many of the associated fauna are opportunistic and do not reproduce on the cassava mealybug; some are attracted more to the bunchy tops with the rich organic material from living and dead cassava mealybugs.
In the fertility life table was determined the net reproductive rate or number of female offspring R othe mean generation time Tdoubling time or the time required for the population to double in number D Tthe intrinsic rate of increase or the innate ability to increase r m and the maximum rate of population growth, using the formulas suggested by Silveira Neto et al.