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vol.28 issue2HOST AND FEEDING PRIVATION ON THE TRICHOGRAMMA ATOPOVIRILIA (HYMENOPTERA: TRICHOGRAMMATIDAE) REPRODUCTIVE CHARACTERISTICSPRODUCTION AND QUALITY OF CHERRY TOMATOES IN TWO TYPES OF GREENHOUSES IN CULTIVARS WITHOUT SOIL author indexsubject indexarticles search
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Idesia (Arica)

On-line version ISSN 0718-3429

Abstract

C. RIOJA, Tommy; VARGAS, Héctor  and  BOBADILLA, Dante. OBSERVATIONS ABOUT DIFFERENTIAL FERTILITY OF TWO ALAR MORPHOTYPES ON PEREGRINUS MAIDIS (ASHMEAD) (HEMIPTERA: DELPHACIDAE) UNDER LABORATORY CONDITIONS. Idesia [online]. 2010, vol.28, n.2, pp.89-95. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292010000200011.

Under agroecological conditions of the Arica valleys, Region of Arica y Parinacota, Chile, the planthopper or corn delphacid,Peregrinus maidis(Ashmead), behavior as strictmonophagous, colonizing amylaceous cornfields, Zea mays L. var. amylacea, and sweet corn, Z. mays L. var. saccharata. Both corn typesare cultivated during all year to consume fresh product (ear of corn), and P. maidis colonization are achieved with the existence of two alar morphotypes, i. e. macropterous forms to colonization, and brachypterous forms in charges to make up increase the local population.Field station observations, with measurements done in microcages, and laboratory specimen, allowed establish that female macropterous forms presented a larger preoviposition (17.8 ± 1.2 days) that brachypterous forms (12 ± 1.1 days). Besides, it last showed a larger oviposition period (20.7 ± 6.7 days) that macropterous females (8.7 ± 1.5 days). Also, the brachypterous females deposited on average a bigger number of eggs (157.8) than those macropterous females (49.7). This records were analyzed through the t of Student test; it was found that for three parameters previously indicated the estadistical differences between both alar morphotypes are very significant (P ≤ 0.001). These differences have relation with each morphotype roll in the dispersion, colonization and exploitation of alimentary resource.

Keywords : Planthopper; Peregrinus maidis; Zea mays L; macropterous; brachypterous; oviposition.

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