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nsect Pest Management for Stored GrainKey Points for 2007• Actellic 5E remains registered as the key protectantinsecticide for use on stored corn as an admixtureduring binning or a topdress application to thegrain surface. Other insecticides that can be usedon stored corn in a similar manner include DiaconII and products containing diatomaceous earth orBacillus thuringiensis. Additionally, a 6 percent malathiondust remains registered and available for purchasefor use on stored corn. See the text and tablein this chapter for details.• Storcide II has replaced Reldan and Storcide. SeeTable 1 for application instructions. Storcide II containschlorpyrifos-methyl and deltamethrin, a pyrethroidfor which international Codex MRLs (maximumresidue limits, roughly the same as tolerances)have been established on certain grains. Storcide IIis labeled for use on the same small grains that previouslywere listed on the Reldan label.• Although the USEPA has granted a residue tolerancefor the active ingredient spinosad on severalstored grains and international Codex MRLs havebeen established, those MRLs have not yet been acceptedby all countries. Commercialization ofspinosad products for use on stored grains is notlikely before 2009• The only malathion product labeled for direct useon small grains and still available for purchase isa 6 percent dust. Its label allows use on corn, barley,oats, rice, rye, sorghum, sunflower seeds, andwheat.• Relatively new fumigants that are labeled for usein grain storages include ECO2fume, which is a mixtureof 2 percent phospine gas in carbon dioxide,and ProFume, which is the fumigant gas sulfurylfluoride. These fumigants are not designed for useby farmer applicators but instead by professionalfumigators.IntroductionGrains produced in Illinois may be stored for periodsof a few weeks to a few years before they are fed orprocessed. The profitability of such storage dependsnot only upon marketing concerns but also uponmaintaining grain quality. The harvest and storage ofgrain do not signal an end to the possibility of lossescaused by insects and pathogens.Successful management of stored-grain insectsis possible only when proper storage practices areimplemented. Insecticides and fumigants shouldbe viewed as supplements to, not replacements for,sound storage methods. When used properly, insecticidesand fumigants limit insect losses in storedgrains without endangering the pesticide applicatoror resulting in excessive pesticide residues that threatenthe health of consumers (livestock or humans) oftreated grain or grain products.This chapter provides recommendations for culturaland chemical control of stored-grain insects. It isrevised annually; always use the current year’s handbook.Changes in registration that occur betweenrevisions will be announced to appropriate mediasources and to Extension offices.5The information in this chapter is provided for educational purposes only. Product trade names have been used for clarity, but reference totrade names does not imply endorsement by the University of Illinois; discrimination is not intended against any
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