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Dinámica espacio-temporal de la roña (Elsinoe perseae), el daño asociado a trips y antracnosis (Glomerella cingulata) del aguacate en Michoacán, México

by Avila Quezada, G.D; Téliz Ortiz, D; González Hernández, H; Vaquera Huerta, H; Tijerina Chávez, L; Johansen Naime, R.M; Mojica Guzmán, A.
Publisher: 2002ISSN: 0185-3309.Subject(s): PERSEA AMERICANA | ELSINOE PERSEAE | GLOMERELLA CINGULATA | THRIPS | ENFERMEDADES DE LAS PLANTAS | FRANKLINIELLA | SCIRTOTHRIPS | PLAGAS DE PLANTAS | MORBOSIDAD | DAÑOS | EPIDEMIOLOGIA | PERSEA AMERICANA | GLOMERELLA CINGULATA | THRIPS (GENUS) | PLANT DISEASES | FRANKLINIELLA | SCIRTOTHRIPS | PESTS OF PLANTS | MORBIDITY | DAMAGE | EPIDEMIOLOGY | PERSEA AMERICANA | GLOMERELLA CINGULATA | THRIPS (GENRE) | MALADIE DES PLANTES | FRANKLINIELLA | SCIRTOTHRIPS | RAVAGEUR DES PLANTES | MORBIDITE | DEGAT | EPIDEMIOLOGIEOnline Resources: Es In: Revista Mexicana de Fitopatología (México) v. 20(1) p. 77-87Summary: The spatial and temporal dynamics of the pathosystems of avocado (Persea americana), Glomerella cingulata (Colletotrichum gloeosporioides), and Elsinoe perseae (Sphaceloma perseae), and the damage associated to thrips were studied in Tancitaro, Michoacan, Mexico, from January to December, 2000, using indices of dispersion, spatial autocorrelation lags and geostatistical maps. The diseases and damage by thrips were studied in an avocado. Hass grove, in 60 fruits of the lower part of 60 trees. The experimental block was divided into 2, 5, 10 and 20 contiguous quadrats by the Greig-Smith method, with a modification; with these quadrats, the randomness deviation was identified using the indices of dispersion. New foci appeared near the primary ones, showing an aggregated pattern; these foci were at random in the middle and final phase of the disease progress and the damage by thrips. Spatial autocorrelation lags with significant contiguous and noncontiguous elements were present into and through rows at different phases oeach epidemic. Rates of aparent disease infection and damage by thrips were calculated by Weibull model. Anthracnose appeared in the last phenological stages of the fruit, and progressed until the last date of the assessment. The greater the rate of incidence of thrips damage in young avocado fruits, the greater the increase of scab severity; as fruits ripen, scab and damage by thrips stopped. Scirtothrips and Frankliniella were the genera of thrips more frequently found.
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The spatial and temporal dynamics of the pathosystems of avocado (Persea americana), Glomerella cingulata (Colletotrichum gloeosporioides), and Elsinoe perseae (Sphaceloma perseae), and the damage associated to thrips were studied in Tancitaro, Michoacan, Mexico, from January to December, 2000, using indices of dispersion, spatial autocorrelation lags and geostatistical maps. The diseases and damage by thrips were studied in an avocado. Hass grove, in 60 fruits of the lower part of 60 trees. The experimental block was divided into 2, 5, 10 and 20 contiguous quadrats by the Greig-Smith method, with a modification; with these quadrats, the randomness deviation was identified using the indices of dispersion. New foci appeared near the primary ones, showing an aggregated pattern; these foci were at random in the middle and final phase of the disease progress and the damage by thrips. Spatial autocorrelation lags with significant contiguous and noncontiguous elements were present into and through rows at different phases oeach epidemic. Rates of aparent disease infection and damage by thrips were calculated by Weibull model. Anthracnose appeared in the last phenological stages of the fruit, and progressed until the last date of the assessment. The greater the rate of incidence of thrips damage in young avocado fruits, the greater the increase of scab severity; as fruits ripen, scab and damage by thrips stopped. Scirtothrips and Frankliniella were the genera of thrips more frequently found.

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