engleski

Accessing slug risk and slug control in oilseed rape

Slugs are amoung the most important pests of oilseed rape. In order to predict slug damage and need for applying slug pellets in oilseed rape, trapping of slugs was conducted in stubble, prior plant emergence (using upturned flowerpot saucers, terracotta colured, 25 cm diameter, with 20 ml of chicken layers` mash placed in a small heap on the soil). The number of slugs counted in traps varied from 1 to 4, what was sufficient to justify the application of slug pellets. Field experiment was conducted from 20th September to 9th October 2007, from plant emergence to four-true-leaf stage. In field experiment three compounds: metaldehyde, methiocarb and Fe (III) pyrophosphate were tested for ability to reduce damage caused in oilseed rape by Arion sp. Férussac 1819 (Gastropoda: Pulmonata: Arionidae). All three treatmants of molluscicide protected rape from severe crop loss, with significant differences amoung methiocarb and other treatments in the last week of the field trial evaluation, what could be explained by wet weather. Also harmful effect of methiocarb to carabid beetle populations and earthworm was evidented.

slug risk; control; oilseed rape

nije evidentirano