Miguel Talavera

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A common drawback in evolutionary science is the fact that the evolution of organisms occurs in geological timing, completely out of the time scale of laboratory experimental work. For this reason, some relevant hypotheses on evolution of Metazoans are based on correlations more than on experimental data obtained for testing the robustness of those(More)
The deceptive Iris lutescens (Iridaceae) shows a heritable and striking flower colour polymorphism, with both yellow- and purple-flowered individuals growing sympatrically. Deceptive species with flower colour polymorphism are mainly described in the family Orchidaceae and rarely found in other families. To explain the maintenance of flower colour(More)
A new species of Tylenchorhynchus Cobb, 1913 from Paraguay, T. shimizui n. sp., and T. leviterminalis Siddiqi, Mukherjee & Dasgupta, 1982 from Japan are described and illustrated. T. shimizui n. sp. is a monosexual species characterised by females with a medium-sized body, L=0.70-0.82 mm, stylet 18.4-20.8 μm long, a rounded lip region slightly set off from(More)
Olive growing is a centenarian activity in Andalusia, Southern Spain. Andalusia holds the largest olive tree growing area in the world. In spite of the relevance of olive growing for the Mediterranean economy, the influence of soil biodiversity on olive crops has been seldom studied. We hypothesized that soil diversity must be well preserved because the(More)
The present research was undertaken to evaluate the effects of soil temperature on the life cycle of root-knot nematodes (RKN) on zucchini-squash in growth chambers and to assess the relationship between Meloidogyne incognita soil population densities at planting (Pi), its multiplication rate, and crop losses of zucchini in field conditions. Thermal(More)
Macroposthonia napoensis n. sp. and M. planilobata n. sp. from Ecuador are described and illustrated. Differential characters of M. napoensis are: first annule with four enlarged submedian lobes but not giving the lip region a disc–like appearance , vagina sigmoid, none or very few anastomoses, a poorly–developed spermatheca, L = 0.33–0.42 mm, V = 89–93,(More)
The host suitability of five zucchini and three cucumber genotypes to Meloidogyne incognita (MiPM26) and M. javanica (Mj05) was determined in pot experiments in a greenhouse. The number of egg masses (EM) did not differ among the genotypes of zucchini or cucumber, but the eggs/plant and reproduction factor (Rf) did slightly. M. incognita MiPM26 showed lower(More)
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