HGCAhas published a review of the implications to the cereals and oilseeds sector followinga recent decision by the European Commission to restrict the use of someneonicotinoid insecticides.
On24 May 2013, restrictions on the use of the clothianidin, imidacloprid andthiamethoxam neonicotinoid insecticides were adopted by the Commission. Therestrictions will apply from 1 December 2013. In anticipation of this decision,HGCA has reviewed the implications of the restrictions on crop protection forthe cereals and oilseeds sector.
Withsections on the different cereal and oilseed crops, Research Review 77 takes a close look at the key pests controlledby neonicotinoid seed treatments in cereals and oilseeds, including virusestransmitted by the pests along with alternative control options and insecticideresistance challenges.
CarolineNicholls, HGCA Research and Knowledge Transfer Manager, stated: The greatestimpact will be on oilseed rape, as these seed treatments are used to controlcabbage stem flea beetle and peachpotato aphids which transmit turnip yellowsvirus.
Thesituation is not as severe for cereal crops, as winter seed treated withneonicotinoids can still be used in autumn to control aphids carrying barleyyellow dwarf virus. The restrictions only affect cereal crops sown betweenJanuary and June.
Theimplications outlined in the review are given in an economic context.
Thepotential total cost to the UK industry from not controlling cabbage stem fleabeetle and turnip yellows virus in oilseed rape could be 72M a year.Alternative chemical control options are available in most situations but thereis a risk of resistance developing to some of the alternatives. To help managethe resistance threat, spray decisions should be made using crop monitoring andspray threshold information, stated Miss Nicholls.
HGCAscabbage stem flea beetle publication (IS24) has been revised to help growersassess the need to use foliar-applied pyrethroid insecticides to control adultbeetles and larvae. HGCA is reviewing all of its publications affected by thedecision.