Onion thrips ( Thrips tabaci Lindeman) damage on early white cabbage grown under mulch and non-mulch conditions

Trdan, S. and Žnidarčič, D. and Kač, M. and Vidrih, M. (2008) Onion thrips ( Thrips tabaci Lindeman) damage on early white cabbage grown under mulch and non-mulch conditions. Acta Phytopathologica et Entomologica Hungarica, 43 (2). pp. 397-404. ISSN 0238-1249

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Abstract

In 2005 the damage caused by onion thrips (Thrips tabaci) on a susceptible hybrid of early cabbage (cv. ‘Parel’) was studied in a block field experiment. The cabbage was grown in four treatments: 1) on non-mulched surfaces, 2) on surfaces mulched with barley straw, 3) on surfaces mulched with hay and 4) on surfaces mulched with black PE mulch. The trial consisted of two parts: the first part included plots that were mulched as indicated from the very beginning (normal), while in the second part the soil was first covered with black PE mulch for about one month, than this was removed and replaced either by organic mulches or left non-mulched (postponed). In this way, we wanted to diminish the yield loss because of low temperatures and abundant precipitation. Under cold and wet conditions in spring which led to late appearance and low levels of the pest, the growing of cabbage under black PE mulch proved most effective and these plants exhibited the greatest head mass as well as the greatest net mass, although they also suffered most damage from the pest. The cabbage in the second part of the experiment exhibited higher head mass as well as higher net head mass compared to the first part.

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