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~ IangsuAgricul, u, alColleg * Ya. gzhou225000AbstraetAccordingtothecharacteristicsofoccurrencesofthethreeinsect mouth estsSogatellalurciiera. Cnaphalocrocirmedinalis, NilaparvatalugensinJianghuaricedistrict. theircombinedinfestationsandeffectsongraingrowthofricewerestudledinpaddyfieldandcementpoolwithcagebyrandomplotdesignofcompletecombinationin1991 a l992. Weightsofthestronggrainandtheweakgramweredetermi Ⅱ edonceeveryfourdaysfromheadingtoharvesting. ThegrowthequationtW a - wasusedtodescribethegraingrowthprocessofeachtreatment · 1e-Fromfirst. secondandthirdorderderivativesoftheequation,converse pas cher, someparameterswerederivedasfollows: a curse, first-class,ugg boots sale, one by one for a Gr ... · (t a, R0 a wherel-turningpointofgrowthcurve ... V-maximumgrowthrate,north face outlet, dr = activegrowthstage. (graingrowthbecomesslowbeforeIandafter2), GT-cumulativeweight0fdrledcontentinactivegrowthstagetandRo-initialgrowthpower · Effects0fcombinedinfestationofthepestsonthestrongandtheweakgramgrowthwereanalysedhytheseparameters.Theresultsofanalysisofvarianceshowedthatlate · f3ctioneffectswerealsosignificantinadditiontothemaineffectsofthecombinedinfestations0nvieldwhichweresignificant. Thisindicatedthatthecombinedinfes-tationsofthepestscausedeconomicdamageeventhoughdensityofeachspeciesWaSbeloweconomicthreshold.ValuesofV ...,columbia sportswear outlet, GTandKdecreasedastheinfestat-tionsaggravated.Moreover. theresultofanalysisalsoshowedtheeffectoftheinfestationontheweakgrainbeinggreaterthanthatonthestronggrain · Keywords $ ogatellalureiiera, Cnaphalocrocismedinalis · Nilaparvatolugens, Gom-binedinfestation,moncler sito ufficiale, graingrowth
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