Biologi Ulat Grayak (Spodoptera frugiperda J. E Smith)

Research on the life cycle and life balance of Spodoptera frugiperda (J. E Smith) has been conducted from September to November 2021 at the Entomology Laboratory of the Department of Pests and Plant Diseases ULM Banjarbaru. The results showed that S. frugiperda underwent changes from egg, larva, pupa and imago stages. This change is called complete metamorphosis. The average number of eggs produced is 45.14 eggs with an egg stage of 7 days, the larval stage has 6 instars, each time span (days) ranges from 2.4 to 3.4, the pupal stage is 7.5 days and the imago stage with brown wings. The male imago has a distinctive pattern while the female imago does not have a distinctive pattern. Imago male with a vulnerable time of 8 days while the female imago 9 days. From the life table, it is known that the GRR value is 316 individuals/generation, the R˳ value is 115.916 individuals/parent/generation, the T value is 30,197 days, the r value is 0.157 individuals/parent/day and the value is 1,170 individuals/parent/day.Telah dilakukan penelitian tentang siklus hidup dan neraca kehidupan Spodoptera frugiperda (J. E Smith) sejak bulan September hingga bulan November 2021 bertempat di Laboratorium Entomologi Jurusan Hama dan Penyakit Tumbuhan ULM Banjarbaru. Hasil penelitian menunjukkan S. frugiperda mengalami perubahan dari stadia telur, larva, pupa dan imago. Perubahan tersebut dinamakan metamorfosis sempurna. Jumlah telur yang dihasilkan rata-rata 45,14 butir dengan waktu stadia telur 7 hari, stadia larva mempunyai 6 instar masing-masing rentang waktu (hari) berkisar antara 2,4-3,4, stadia pupa 7,5 hari dan stadia  imago dengan sayap berwarna kecoklatan. Pada imago jantan memiliki pola yang khas sedangkan imago betina tidak memiliki pola yang khas. Imago jantan dengan rentan waktu 8 hari sedangkan imago betina 9 hari. Dari neraca kehidupan diketahui nila GRR 316 individu/generasi, nilai R  115,916 individu/induk/generasi, nilai T 30,197 hari,  nilai r 0,157 individu/induk/hari dan nila