Demographic statistics of Dolichotetranychus floridanus Banks on two cultivars of pineapple (Ananas comosus (L.) Merr.)
Abstract
Nanas merupakan salah satu tanaman buah yang penting di Indonesia. Salah satu permasalahan penting pada budidaya nanas adalah serangan hama. Penelitian ini bertujuan untuk mendapat informasi mengenai biologi, demografi dan siklus hidup dari Dolichotetranychus floridanus Banks pada dua kultivar nanas (Queen dan Cayenne). Pengamatan perkembangan tungau (telur-imago) dilakukan setiap 6 jam. Pengamatan terhadap imago dilakukan setiap hari yang muncul untuk mengamati keperidian. Neraca kehidupan disusun berdasarkan kesintasan dan keperidian D. floridanus. Berdasarkan tabel tersebut dilakukan penghitungan berbagai variabel pertambahan pertumbuhan populasi, yaitu laju reproduksi kotor, laju reproduksi bersih, rata-rata waktu generasi dan laju pertumbuhan intrinsik. Nilai variable pertumbuhan populasi menunjukkan kultivar Queen lebih sesuai untuk D. floridanus dibandingkan kultivar Cayenne.
Kata kunci: tungau jingga, nanas, statistik demografi
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