Coconut rhinoceros beetle native range7/28/2023 ![]() The coconut rhinoceros beetle (CRB) can be controlled using entomopathogenic fungi (EPF) as biological control agents. The adult beetle attacks the young leaf midrib by broaching and entering the young tissue which results in plant death in high-level attacks (Alouw et al. On the other hand, pests that are in the adult stage are strong fliers, thus their control at this stage is an effective procedure because infected beetles may quickly spread and distribute their conidia to other breeding and foraging sites (Paudel et al. Therefore, direct treatment of breeding sites such as decomposing trunks or compost heaps using biological control agents is considered as an efficient strategy against O. Early detection of larval attack is difficult and controlling this pest at advanced levels of crop damage is inefficient (Hosang et al. The second- and third-instar larvae can be growing rapidly in the root area of plants and feed on the rootstock near the soil surface and plant roots. rhinoceros can attack different parts of the coconut trees. Severe attack rates by this pest affects tree damage ranging from 50 to 100% (Manjeri et al. (Coleoptera: Scarabaeidae) is one of the important pests on coconut and oil palm that causes production losses and young plant mortality reaching 60% and 25%, respectively (Fauzana et al., 2018). majus isolates and CRB-isolated strains suggests a possible relationship between pathogenicity and host specificity with phylogenetic status or DNA sequence polymorphisms. majus isolates exhibited high pathogenicity against O. The local species of Metarhizium have been isolated from infected CRB larvae, and M. This result indicated a possible relationship between phylogenetic status or DNA sequence polymorphisms with Metarhizium pathogenicity and host specificity. rhinoceros larval cadaver with a faster lethal time (for 50% mortality). In addition, the isolate MaMa had the highest virulence against O. Neighbor-joining analysis showed a close resemblance between the isolate MaMa and the strain ARSEF 1946, which was isolated from the CRB. rhinoceros larvae than other Metarhizium species. majus and MALC had higher pathogenicity against O. The present investigation reported that isolates MaLe, MaMa, MaWa, and MaSi produced higher mortality values than other isolates, supporting that M. anisopliae) in the MGT clade, known as MALC ( M. Interestingly, the isolate MaSi produced conidial lengths well above the range of conidial sizes recorded and placed these isolates ( M. Identified Metarhizium species exhibited varied sizes of conidia, but fell within the size ranges reported in previous studies. Thirteen isolates were obtained which were divided into 4 clades based on phylogenetic analysis by the ITS rDNA region, namely M. This study aimed to identify Metarhizium species isolated from infected CRB larvae with high pathogenicity to host pests in East Java, Indonesia. The identification of local EPF species is a strategic approach to develop potential biopesticides with standard properties including host specificity, climate suitability, and significantly suppressing the target pest population. Several studies have proven that the native fungal isolates have strong pathogenic activity than EPF introduced from other regions. Application of this fungus as a biopesticide is influenced by regional environmental conditions that affect the pathogenic activity against the targeted pest. and 5) only occurrences collected in Hawaii by the CRB response team.Metarhizium is one of the entomopathogenic fungi (EPF) that has been widely reported as a useful agent for controlling the coconut rhinoceros beetle (CRB), Oryctes rhinoceros L. This approach was applied to different subsets of the available CRB occurrence data including: 1) all available global data (excluding Hawaii) 2) only occurrences within CRB's native range 3) only occurrences in the species non-native range (excluding Hawaii) 4) only occurrences in the species insular non-native range (excluding Hawaii). This CRB habitat suitability was calculated using a simple bioclim approach where suitability values reflect the proximity of a given location on a map to the median climatic condition across the occurrences considered. This dataset simply describes the suitability of the Hawaiian landscape to CRB spread based on climatic conditions (using mean annual temperature and precipitation) of global and local species occurrences. As this invasive is found on the island of Oahu primarily at lower elevations, there are concerns about the species spreading towards high value native habitats at higher elevations and/or to other islands across the state. The arrival of the coconut rhinoceros beetle (CRB, Oryctes rhinoceros) in Hawaii poses serious threats to endemic palm species, crop species and iconic palm trees across the archipelago.
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