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Oryctes rhinoceros  (Coleoptera: Scarabaeidae) is  an importan pest on coconut trees. Control of  O. rhinoceros  can be done in various ways, such as by physical, mechanical, biological, and chemical. The fungus  Metarhizium anisopliae  is a biological agent that can suppress the development of the  O. rhinoceros  . Effectiveness of  M. anisopliae  fungus is largely determined by the quality/grade conidia of the fungus consist of its density, viability and patogenicity against the target pest. For that, studies have been conducted to determine the quality and effectiveness biological control of  M. anisopliae  isolates Kalteng (Central Kalimantan) against  O. rhinoceros . Tests conducted in the Entomology Laboratory of Research Institute for Spices and Medicinal Crops  (Balittro), and around the home screen in Balittro, Bogor.  The fungus  M. anisopliae  isolates originating from Central Kalimantan (Kalteng), while the larvae of  O. rhinoceros  from Yogyakarta. The results showed that the fungus conidia  M. anisopliae  isolates Kalteng has a density of over 10 8 , while the viability above 90%. Pathogenicity to larvae of  O. Rhinoceros  &amp;gt; 50%. This character indicates a good quality of these fungi as biological control agent. The fungus of  M. anisopliae  isolates Kalteng at concentrations of 10 6  and 10 8  can killed up to 90% third instar O. rhinoceros larvae  in field conditions. So both these concentrations can be used in the control of  O. rhinoceros  in the field. ABSTRAK      Hama  Oryctes rhinoceros  (Coleoptera: Scarabaeidae) merupakan hama penting tanaman kelapa . Pengendalian  O. rhinoceros  dapat dilakukan dengan berbagai cara yaitu secara fisik, mekanik, hayati, dan kimiawi.  Cendawan   Metarhizium anisopliae  merupakan agens hayati yang dapat menekan perkembangan hama   O. rhinoceros . Efektivitas cendawan  M. anisopliae  sangat ditentukan oleh kualitas/mutu konidia cendawan tersebut yang meliputi kerapatan, viabilitas  dan patogenitasnya terhadap hama sasaran. Untuk itu telah dilakukan penelitian untuk mengetahui mutu dan keefektifan agens pengendali hayati   M. anisopliae  isolat Kalimantan Tengah terhadap  O. rhinoceros.  Pengujian dilakukan di Laboratorium Hama Balai Penelitian Tanaman Rempah dan Obat (Balittro) dan di sekitar rumah kasa di Balittro, Bogor.  Isolat cendawan  M. anisopliae  yang digunakan berasal dari  Kalteng, sedangkan larva  O. rhinoceros  berasal dari Yogyakarta. Hasil penelitian menunjukkan bahwa Cendawan  M. anisopliae  isolat Kalteng memiliki kerapatan konidia di atas 10 8 , sedangkan viabilitasnya di atas 90%.  Patogenisitas terhadap larva  O. rhinoceros  &amp;gt; 50%.  Karakter ini menunjukkan mutu yang baik dari cendawan tersebut sebagai agens pengendali hayati. Cendawan  M. anisopliae  isolat Kalteng pada konsentrasi 10 6  dan 10 8  dapat mematikan 90%  larva  O. rhinoceros  instar 3 pada kondisi lapangan. Sehingga kedua konsentrasi tersebut dapat digunakan dalam mengendalikan  O. rhinoceros  di lapangan.

buletin palma

Uji Mutu dan Keefektifan Metarhizium anisopliae Isolat Kalimantan Tengah Terhadap Oryctes rhinoceros (Coleoptera: Scarabaeidae) [Quality Test and Effectiveness of Metarhizium anisopliae Isolates From Central Kalimantan Against Oryctes rhinocerus]