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A Thermal Time Based Method for Determining the Fecundity of Meloidogyne Javanica in Relation To Modelling Its Population Dynamics

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For more content, see Nematology.

Egg laying over 24 h by single females of Meloidogyne javanica within small segments of root was assessed on agar plates and compared with the numbers of eggs in their egg masses over a 65-day period. At a constant 26°C egg laying commenced between 18 and 21 days and continued for at least a further 45 days. Mean rates of egg laying were between 60 and 80 eggs per day between 23 and 45 days but declined thereafter. With a base temperature for development of 13°C an estimated 0.2°C days was required for the production of each egg and overall each female was estimated to have laid nearly 2000 eggs, 1500 of which were laid within 45 days of inoculation. The application of thermal time information to these results is briefly discussed in relation to modelling the population dynamics of root knot nematodes and the extent to which generations overlap.

Affiliations: 1: National Agricultural Research Foundation, Plant Protection Institute, 71110, Heraklion, Crete, Greece; 2: Scottish Crop Research Institute, Invergowrie, Dundee, DD2 5DA, Scotland, UK


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