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Caracteres morfológicos y bioquímicos de Rosa x hybrida contra Tetranychus urticae Koch en invernadero

2011; National Institute of Forestry, Agriculture and Livestock Research ( INIFAP ); Volume: 2; Issue: 3 Linguagem: Inglês

2007-9230

Ricardo Javier Flores Canales, R. Villa-Real, Jerónimo Landeros Flores, Ernesto Cerna Chávez, Agustín Robles Bermúdez, Néstor Isiordia Aquino,

Insect-Plant Interactions and Control

The objective of this study was to know the population behavior of the two spotted mite (Tetranychus urticae Koch.) In 13 rose cultivars and to determine the correlation between the biochemical characteristics (terpenes, tannins and essential oils) and morphological characteristics (trichomes, glands And leaf thickness), coupled with mite populations of two spots. A population of 100 adult females per plant was released in 13 cultivars of rose for cutting; Once the mite population was established, samples of 2 to 7 g of foliar mass were collected at a weekly frequency for 57 days. A biochemical analysis of the samples was performed and the resulting information was subjected to analysis of variance and comparison of means by the Tukey method (p = 0.05). Of the mite populations in 13 cultivars (expressed in leaf-mite) on eight sampling dates; In addition, a correlation analysis and multiple regression of the population with the variables were done. The cultivar Luna® presented the highest population growth with an average of 2 784.1 mites per day, followed by Gran Gala®, Verdi®, and Vendela®, with 1 472.5, 1 307 and 1076 mites per day respectively. On the other hand, in the cultivars Movie Star®, Emma® and Virginia®, there were fewer mites with 3 77.5, 444.7 and 486.4, respectively. From the regression analysis, negative correlation was observed with the essential and positive oils in terpenes, leaf thickness, and nitrogen content.