Effect of flight activity of stem weevils (Ceutorhynchus napi, C. pallidactylus) and application time on insecticide efficacy and yield of winter oilseed rape

Tomáš Spitzer, Pavel Matušinský, Dagmar Spitzerová, Jan Bílovský and Jan Kazda
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Tomáš Spitzer: Agrotest fyto, Ltd, Kroměříž, Czech Republic
Pavel Matušinský: Agrotest fyto, Ltd, Kroměříž, Czech Republic
Dagmar Spitzerová: Agrotest fyto, Ltd, Kroměříž, Czech Republic
Jan Bílovský: Agrotest fyto, Ltd, Kroměříž, Czech Republic
Jan Kazda: Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic

Plant Protection Science, 2014, vol. 50, issue 3, 129-134

Abstract: During 2010-2012, we monitored flight activity of male and female stem weevils (Ceutorhynchus napi, C. pallidactylus) using yellow water traps, the effectiveness of various application dates for the insecticide thiacloprid (72 g active ingredient/ha), and the influence on yield. The first occurrence of beetles in traps was recorded after soil temperature at 5 cm reached 8°C in all experimental years. In all years, males of C. pallidactylus dominated in the traps and the times of beetles' first occurrence. The most effective applications of thiacloprid at the stated rate were 14 days (2010), 6 days (2011), and 1 day (2012) after peak flight. Females with eggs appeared in bowls in 2010 and 2012 at first flight, while in 2011 no females were recorded. After the most effective applications, yields increased significantly in 2010 (+5% vs. the control) and in 2011 (+4%), and insignificantly in 2012 (+2%).

Keywords: cabbage stem weevil; oilseed rape stem weevil; thiacloprid; yellow water traps (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpps:v:50:y:2014:i:3:id:21-2013-pps

DOI: 10.17221/21/2013-PPS

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