Asociacion entre thrips (Thrips tabaci Lindeman y Frankliniella cestrum Moulton) durante la floracion en uva de mesa [cv. Thompson Seedless, Ribier, Calmeria, Flame Seedless] y Russet en la cosecha. 2: Aspectos biologicos.
1993
Ripa D Renato | Rodriguez A Fernando | Vargas M Rene
The relationship between scarring of table grapes and thrips during blossoming period was studied through bagged flower clusters to eliminate or confine thrips. The observations were carried out at Los Andes, La Cruz (V Region) and Paine (Metropolitan Region), on the cultivars Thompson Seedless, Ribier, Calmeria and Flame Seedless. Adult Thrips tabaci colonized the cluster mainly during anthesis probably lured by pollen because they feed on it. The female oviposited in the rachis of the cluster, pedicels and newly developing berries, leaving small scars visible only with a 10x lens. The nymphs fed on pollen and internal tissues of the calyptra. Some feeding also occurred on the surface of newly developing berries which caused scarring. However the amount of damage was limited and occurred only under high nymphal densities. Apparently, Frankliniella cestrum does not cause scarring but it was associated with halo spot around the ovipositions site. Natural enemies of thrips in the cluster included spiders of the Clubionidae and Anyphaenidae families.
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