?url_ver=Z39.88-2004&rft_id=1917021029&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=UJI+EFEKTIVITAS+KANDIDAT+BAKTERI+ENTOMOPATOGEN+Bacillus+thuringiensis+TERHADAP+LARVA+Spodoptera+frugiperda&rft.creator=ALVIAN+%2C+FIRMANSAH&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=570+Biologi&rft.description=Tanaman+pangan+dan+hortikultura+memiliki+potensi+yang+cukup+tinggi+sebagai+sumber+peningkatan+industri+pangan+di+Indonesia.+Kendala+utama+dalam+pengembangan+produksi+tanaman+pangan+dan+hortikultura+adalah+serangan+hama+larva+S.+frugiperda.+Pengendalian+hama+menggunakan+insektisida+kimia+menyebabkan+dampak+negatif+dalam+jangka+panjang.+Pengendalian+larva+Spodoptera+frugiperda+secara+hayati+menjadi+salah+satu+pilihan+untuk+mengendalikan+larva+tersebut%2C+yaitu+dengan+memanfaatkan+bakteri+B.+thuringiensis.+Tujuan+dari+penelitian+ini+adalah+mengetahui+isolat+B.+thuringiensis+yang+paling+baik+dalam+membunuh+larva+S.+frugiperda+dan+mengetahui+konsentrasi+suspensi+B.+thuringiensis+yang+paling+efektif+serta+mengetahui+tingkat+mortalitas+larva+S.+frugiperda.+Rancangan+penelitian+ini+adalah+Rancangan+Acak+Lengkap+(RAL).+Jenis+isolat+bakteri+B.+thuringiensis+yang+digunakan+sebanyak+7+isolat.+Konsentrasi+yang+digunakan+adalah+10+ml%2C+15+ml%2C+dan+20+ml+suspensi+B.+thuringiensis.+Penelitian+ini+menggunakan+kontrol+negatif+dengan+aquades+steril.+Kontrol+positif+menggunakan+insektisida+Sapporo+52+EC.+Parameter+yang+diamati+pada+penelitian+ini+adalah+konsentrasi+yang+paling+efektif+dalam+membunuh+larva+S.+frugiperda%2C+persentase+tingkat+mortalitas+larva%2C+dan+perubahan+morfologi+pada+larva.+Data+mortalitas+larva+dianalisis+menggunakan+Analysis+of+Variance+(ANOVA)+dan+diuji+lanjut+dengan+uji+Duncan.+Hasil+yang+diperoleh+rata-rata+mortalitas+larva+S.+frugiperda+yang+tertinggi+menggunakan+isolat+Bt2TMA26+sebesar+93.33%25%2C+isolat+Bt1TBA4+sebesar+80%25%2C+dan+isolat+Bt5TB5+sebesar+73.33%25.+Konsentrasi+suspensi+bakteri+B.+thuringiensis+yang+paling+baik+dalam+membunuh+larva+S.+frugiperda+adalah+20+ml.+Dapat+disimpulkan+isolat+bakteri+B.+thuringiensis+mampu+dimanfaatkan+sebagai+agen+pengendali+hayati+alami+pada+hama+larva+S.+frugiperda+yang+menyerang+tanaman+pangan+dan+hortikultura.%0D%0A%0D%0AKata+kunci%3A+Bacillus+thuringiensis%2C+Larva+Spodoptera+frugiperda%2C+Efektivitas%2C+Mortalitas%2C+Konsentrasi+Suspensi%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0AFood+crops+and+horticulture+have+quite+a+high+potential+as+a+source+of+food+industry+improvement+in+Indonesia.+The+main+obstacle+in+the+development+of+food+crop+production+and+horticulture+is+pest+attack+larvae+S.+frugiperda.+Pest+control+using+chemical+insecticides+has+a+long-term+negative+impact.+Larval+control+S.+frugiperda+biologically+is+one+of+the+options+for+controlling+these+larvae%2C+namely+by+utilizing+bacteria+B.+thuringiensis.+This+research+aims+to+know+the+isolates+B.+thuringiensis+the+best+at+killing+larvae+S.+frugiperda+and+determine+the+concentration+of+the+suspension+B.+thuringiensis+the+most+effective+and+determine+the+mortality+rate+of+larvae+S.+frugiperda.+The+design+of+this+research+is+completely+randomized+design+(CRD).+Types+of+bacterial+isolates+B.+thuringiensis+7+isolates+were+used.+The+concentrations+used+were+10+ml%2C+15+ml%2C+and+20+ml+of+the+suspension+B.+thuringiensis.+This+study+used+a+negative+control+with+sterile+distilled+water.+The+positive+control+used+Sapporo+52+EC+insecticide.+The+parameters+observed+in+this+study+were+the+concentrations+that+were+most+effective+in+killing+the+larvae+S.+frugiperda%2C+the+percentage+mortality+rate+of+larvae%2C+and+morphological+changes+in+larvae.+Larval+mortality+data+were+analyzed+using+Analysis+of+Variance+(ANOVA)+and+further+tested+by+testing+Duncun.+The+results+obtained+were+average+larval+mortality+of+S.+frugiperda+the+highest+using+Bt2+isolate+TMA26+at+93.33%25%2C+isolate+Bt1TBA4+at+80%25%2C+and+isolate+Bt5TB5+at+73.33%25.+Bacterial+suspension+concentration+B.+thuringiensis+the+best+at+killing+larvae+S.+frugiperda+is+20+ml.+It+can+be+concluded+that+bacteria+isolates+B.+thuringiensis+can+be+used+as+a+natural+biological+control+agent+on+pest+larvae+S.+frugiperda+that+attack+food+and+horticultural+crops.%0D%0A%0D%0AKeywords%3A+Bacillus+thuringiensis%2C+Spodoptera+frugiperda+Larvae%2C+Effectiveness%2C+Mortality%2C+Suspension+Concentration&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2023-08-01&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F75789%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F75789%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F75789%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++ALVIAN+%2C+FIRMANSAH++(2023)+UJI+EFEKTIVITAS+KANDIDAT+BAKTERI+ENTOMOPATOGEN+Bacillus+thuringiensis+TERHADAP+LARVA+Spodoptera+frugiperda.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F75789%2F