Naslov
Imapact of trap cropping on occurrence of spring oilseed rape pests

Autori
Gotlin Čuljak, T., Juran, I., Büchs, W., Grubišić, D.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Skup
64th International Symposium on Crop Protection

Mjesto i datum
Gent, Belgija, 22.05.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
trap crop plants; oilseed rape; stem weevils; pollen beetle

Sažetak
Insecticide application is still the most common measure of insect pest management in oilseed rape (Brassica napus L.) although resistant pest populations are increasing, in particular pollen beetles (Meligethes aeneus (Fabricius, 1775)). Intensive insecticides usage leads to negative effects on beneficials, threatens to biodiversity and reduces the economic competitiveness of crops. Alternative strategies of pest control are therefore required. The role of trap cropping plants is to retain and move pests away from the main crop which allow reduction of insecticide input necessary for their control. In some cases insecticides application can be completely excluded. The objective of the experiment reported here was to determine the effectiveness of turnip rape (Brassica rapa (L.)) as trap crop on apperance and damage of rape stem weevil (Ceutorhynchus napi Gyllenhal, 1837), cabbage stem weevil (Ceutorhynchus pallidactylus Marsham, 1802) and pollen beetle on oilseed rape plants. The trial with three production systems (conventional, integrated and organic) of oilseed rape was set up in 2010 on the site of Šašinovečki Lug. Optimal time for insecticide application for stem mining weevils was determined according to number of adults in yellow water traps. Beating trays on flower stands were used to determine optimal time for insecticide application of pollen beetles. Oilseed rape plants were dissected to determine average number of feeding marks, average lenght of feeding tubes in leaves and stems and average number of stem mining weevils larvae per plant. Flower stands of the main raceme were collected and buds were visually assessed for feeding holes. Buds with holes were dissected to determine average number of eggs and larvae of pollen beetles. Results show significantly lower number of feeding marks caused by stem mining weevils and reduced lenght of feeding halls caused by stem mining weevils larvae on oilseed rape plants in relation to turnip rape plants. Significantly lower number of pollen beetles, percentage of damaged buds, number of pollen beetle eggs and larvae per plant was determine on oilseed rape plants in relation to trap crop plants. In integrated and organic system of oilseed rape production insecticides against pollen beetle were not applied because the threshold for this pest has not been exceeded. Trap cropping plants have proven to be effective because they were attracted and prevented transfer of the most important spring pests on oilseed rape crop.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA