Tag Archives: white cabbage cultivars

283-288 K. Jõgar, L. Metspalu, K. Hiiesaar, A. Ploomi, E. Svilponis, A. Kuusik,N. Men´shykova, I. Kivimägi and A. Luik
Influence of white cabbage cultivars on oviposition preference of the Pieris rapae L. (Lepidoptera: Pieridae)
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Influence of white cabbage cultivars on oviposition preference of the Pieris rapae L. (Lepidoptera: Pieridae)

K. Jõgar, L. Metspalu, K. Hiiesaar, A. Ploomi, E. Svilponis, A. Kuusik,N. Men´shykova, I. Kivimägi and A. Luik

Department of Plant Protection, Institute Agricultural and Environmental Sciences, EstonianUniversity of Life Sciences; Kreutzwaldi 1, Tartu, 51014, Estonia;e-mail: katrin.jogar@emu.ee

Abstract:

The aim of the present study was to determine the oviposition preference of Small White (Pieris rapae L.) on five different white cabbage (Brassica oleracea var. capitata f. alba) cultivars. The experiment showed that in first year butterflies preferred late-matured cultivar ′Krautkaizer′ as the site for oviposition; 35.8% of eggs counted during the observation period were gathered from this plant. The next choice was mid-season cultivar ′Lennox′ by 21.6%. In second year the preferred cultivars were late-matured ′Turquoise′ (26%), ′Lennox′ (22.1%) and ′Krautkaizer′ (20%). The egg laying activity was high during whole test period in both years of those variants.

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406-411 L. Metspalu, K. Hiiesaar, K. Jõgar, E. Švilponis, A. Ploomi, I. Kivimägi,A. Luik and N. Mens’hikova
Oviposition preference of Pieris brassicae (L) on different Brassica oleracea var. capitata L. cultivars
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Oviposition preference of Pieris brassicae (L) on different Brassica oleracea var. capitata L. cultivars

L. Metspalu, K. Hiiesaar, K. Jõgar, E. Švilponis, A. Ploomi, I. Kivimägi,A. Luik and N. Mens’hikova

Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences,
¹ Kreuzwaldi St, 51014, Tartu; e-mail: Luule.Metspalu@emu.ee

Abstract:

Abstract Cabbage White Butterfly, Pieris brassicae L. is widely distributed pest world wide and causes severe damage to white cabbage (Brassica oleracea var. capitata f. alba L.). We studied oviposition preference of P. brassicae on six different cabbage cultivars in the field experiment. As in Estonia farmers grow rather numerous cabbage cultivars, the determination of more resistant cabbage cultivars is of great importance for farmers. Significantly more eggs were laid on the late cultivars ‘Krautkaizer’ (52% of all of the counted eggs) and ‘Turquoise’ (40%). The mid season cultivars ‘Krautman’, and ‘Lennox’ were chosen more or less to the same extent (2.5–5%). P. brassicae adults avoid the early cultivars ‘Parel’ and ‘Golden Acre’.

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451-456 A. Ploomi, K. Jõgar, L. Metspalu, K. Hiiesaar, E. Švilponis, I. Kivimägi,N. Men'shykova, A. Luik, I. Sibul and A. Kuusik
Effect of cultivar on oviposition preference of the cabbage moth, Mamestra brassicae L. (Lepidoptera: Noctuidae)
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Effect of cultivar on oviposition preference of the cabbage moth, Mamestra brassicae L. (Lepidoptera: Noctuidae)

A. Ploomi¹, K. Jõgar¹, L. Metspalu¹, K. Hiiesaar¹, E. Švilponis¹, I. Kivimägi¹,N. Men'shykova¹, A. Luik¹, I. Sibul² and A. Kuusik¹

¹Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences,Kreutzwaldi 1, Tartu 51014, Estonia; e-mail: angela.ploomi@emu.ee
²Institute of Forestry and Rural Engineering, Estonian University of Life Sciences,Kreutzwaldi 5, Tartu 51014, Estonia

Abstract:

The oviposition preference of the cabbage moth, Mamestra brassicae L. (Lepidoptera: Noctuidae) was investigated on white cabbage cultivars under field conditions in two vegetation periods. Significantly less eggs were laid on cultivar ‘Golden Acre’. There were no differences in the number of eggs found on the cultivar ‘Lennox’, ‘Krautman’, ‘Krautkaiser’ and ‘Turquoise’. The cultivar ‘Parel’ showed different results during experimental period. The data on cabbage moth oviposition preferences can be used in sustainable plant protection strategies in organic farming.

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