Abstract
Oryctes rhinoceros L. (Coleoptera: Scarabaeidae) is a pest of coconut plant. Metarhizium anisopliae and Enthomopatogenic Nematodes are biological control agents. The purpose of this study was to determine the ecology of insect pests controlled by fungi Metarhizium anisopliae (MET), Enthomopatogenic Nematodes (NEP) and and the mixture of MET and NEP for controlling O. rhinoceros larvae on the field. M. anisopliae used was in the form of kaolin powder formulation (WP). The nematodes used were H eterorhabditios sp. Nematodes formulation was in the form of liquid with sponge medium contained 10 x 10 6 NEP in every pack. The study used Randomized Block Design with 3 types of treatment and 10 times repetition on 10 larvae. The result of six weeks treatment showed that the highest larval mortality was obtained from the treatment with the mixture of MET and NEP. Biological control using two biological agents (MET and NEP) is better than only MET or NEP. The benefit of research is for the recommendation of O. rhinoceros larvae control.
Highlights
IntroductionOryctes rhinoceros beetle is one of the major pests attacking coconut crops in Indonesia (Indriyanti et al, 2018)
Oryctes rhinoceros beetle is one of the major pests attacking coconut crops in Indonesia (Indriyanti et al, 2018). It has reportedly attacked the coconut plants in Africa, especially in Pacific Island (Jackson, 2009), in Malaysia (Manjeri et al, 2014), Arab (Khudhair et al 2015)
The results showed that controlling O. rhinoceros larvae with the mixture of Metarhizium anisopliae (MET) and NEP resulted in faster larval mortality (2-5 weeks) than the treatment with the MET (2-7 weeks) or the NEP (2-8 weeks), while larval mortality without the administration of MET or NEP was 13-20%, the larvae that remained alive was 80-87% (Indriyanti at al., 2017)
Summary
Oryctes rhinoceros beetle is one of the major pests attacking coconut crops in Indonesia (Indriyanti et al, 2018). It has reportedly attacked the coconut plants in Africa, especially in Pacific Island (Jackson, 2009), in Malaysia (Manjeri et al, 2014), Arab (Khudhair et al 2015). There is nematode netomopatogen which attack insect Both are safe for the environment, because it does not cause environmental pollution and does not cause resistance to insect pests (Hajek & Delalibera, 2010; Divya & Sankar, 2009)
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