Abstract
The prevalence of entomopathogenic fungus, Neozygites fumosa (Zygomycetes: Entomo-phthorales) on the papaya mealybug, Paracoccus marginatus (Hemiptera: Pseudococcidae), was studied in Bogor in two districts: Bubulak and Rancabungur in 2011. Thirty plants of either papaya or cassavas were sampled 8 times, once a week for insect population and biweekly for the fungus infection sampling. The results showed that the cassava mealybug was not found on both plants and all locations. The populations of papaya mealybug in Bubulak were higher than in Rancabungur. The populations of papaya mealybug on papaya were higher than those of cassava. However, N. fumosa infection levels on both plants and both locations were not significantly different.
Highlights
The prevalence of entomopathogenic fungus, Neozygites fumosa (Zygomycetes: Entomophthorales) on the papaya mealybug, Paracoccus marginatus (Hemiptera: Pseudococcidae), was studied in Bogor in two districts: Bubulak and Rancabungur in 2011
The results showed that the cassava mealybug was not found on both plants and all locations
Potensi cendawan entomophthorales dalam mengendalikan kutu putih pepaya Paracoccus marginatus Williams & Granara de Willink (Hemiptera: Pseudococcidae) di lapanganan
Summary
Lahan pepaya yang digunakan dalam penelitian ini memiliki luas 1800 m2 dengan populasi 350 tanaman yang ditanam dengan jarak 2,5 m x 1,5 m. Lahan pepaya di Rancabungur berdekatan dengan lahan pertanaman ubi kayu dan lahan pertanaman jagung yang ditanam tumpang sari dengan tanaman ubi jalar. Tanaman ubi kayu di Rancabungur yang digunakan sebagai lahan penelitian ditanam pada lahan seluas 1400 m2 dengan jarak tanam 50 cm x 50 cm serta populasi sebanyak 600 tanaman. Lokasi pertanaman ubi kayu yang diamati adalah lahan dengan luas 1600 m2 dengan jarak tanam 50 cm x 50 cm serta populasi sebanyak 1000 tanaman. Tanaman ubi kayu ditanam secara monokultur yang berdekatan dengan lahan pertanaman jagung. Pengamatan populasi kutu putih dilakukan dengan menghitung jumlah kutu putih P. marginatus yang ada pada daun (pepaya dan ubi kayu) tanaman contoh. Proses identifikasi lebih lanjut dan lebih jelas dilakukan dengan melihat struktur hyphal bodies, cystidia, rizoid, resting spores dan jumlah inti sel masing-masing struktur (Keller 2007)
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