Siahaan, Parluhutan and ., Saroyo and Langoy, Marnix L.D. and Saimima, Arie
(2019)
Host Diversity of Beauveria Bassiana (Balsamo) Vuillemin in
Rice Plantations in Bolaang Mongondow Regency.
In: IORA International Conference on Operations Research, 19-20 September 2019, Manado, Indonesia.
Abstract
Beauveria bassiana can attack a variety of hosts and their virulence can vary at each host and
location. Exploration of the diversity of hosts B. bassiana from local isolates needs to be done as
initial information that can explain the ability of B. bassiana in infecting insects. This study aims
to analyze the diversity, abundance, and density of host insects infected by B. bassiana local
isolate. Sampling locations were selected in three district, each district selected three stations
and each station consisted of 10 plots. The location of sampling is determined by the purposive
random sampling method. Each station was made a plot measuring 1x 1 m and distributed
randomly. Every insect infected with B. bassiana was taken to a laboratory for identification. The
results showed that there were five insects that hosted B. bassiana, namely Nilaparvata lugens,
Scotinophara coarctata, Leptocorisa oratorius, Nezara Viridula and Paraeucosmetus pallicornis.
The highest host diversity index was found in North Dumoga with a value of 1.47. The highest
abundance was found in N. lugens host in East Dumoga with a value of 43%. The highest density
was found in the host N, lugens in Dumoga Tengah with a value of 1.93 ind / m2. There were
indications of differences in virulence of the B. bassiana local isolates that were influenced by
the spesies of host and location
Keywords : Abundance, Beauveria bassiana, Bolaang Mogondow Regency, density, diversity
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