EVALUASI LAPANG TERHADAP DAMPAK APLIKASI INSEKTISIDA ISOPROCARB PADA SERANGGA PREDATOR DAN HAMA KUTU PERISAI AULACASPIS TEGALENSIS Zhnt. (HOMOPTERA: DIASPIDIDAE) DI PERTANAMAN TEBU

Rosma Hasibuan .

Abstract


Field evaluation of isoprocarb insecticide-application-effects on predacious insects and scale pest Aulacaspis tegalensis Zhnt. (Homoptera: Diaspididae) in sugarcane plantations.  The sugarcane scale, Aulacaspis tegalensis Zehntner,  is a new  serious pest of sugarcane in Lampung Province.  Over the years, most control practices against A. tegalensis  rely on the use of chemical insecticide.  A  field  study was conducted to assess  the  impact of  isoprocarb (carbamate-insecticide) on sugarcane scale pests  and  their natural predators in sugarcane  plantation.  The results indicated  that the application of  isoprocarb  (at recommended  concentration = 1.25 mg/L) in sugarcane field failed to cause  a significant reduction on  scale pest  populations.  In contrast, the numbers of  predacious insects was significantly reduced  in isoprocarb-treated-field plots.     The  predacious insects  in association with scale pests in sugarcane fields were predominantly  coccinellids.  Four species of primary predacious coccinellids attacking scale pests were: Chilocorus melanophthalmus, Chilocorus sp.,  Scymnus sp, and Telsimia sp.  This field study indicated that the predacious species were more susceptible to isoprocarb than their prey.

Keywords


sugarcane scale insect, Aulacaspis tegalensis, predator, isoprocarb insecticide

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DOI: http://dx.doi.org/10.23960/j.hptt.2469-74

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