Susceptibility variation to different entomopathogenic nematodes in Strategus aloeus L (Coleoptera: Scarabaeidae)

Abstract

Strategus aloeus L (Coleoptera: Scarabaeidae), known as “Little bull” or oil palm “chiza” is a limiting pest in palm plantation in Cesar Colombia. Its management is based on pesticide use or old palm removal in renewal lots. Therefore, other alternatives are being sought out. Entomopathogenic nematodes isolated from the Colombian Andean region were evaluated. Under laboratory conditions S. aloeus third instar larvae exposure to 160 infective juveniles (IJs) per/cm2Steinernema sp3 JCL027, S. feltiae SCT125, S. websteri JCL006, S. colombiense SNI0198, Heterorhabditis bacteriophora HNI0100, H. bacteriophora HASA702, H. indica SL0708 (n = 20) was evaluated under a completely randomized design. The experiment was repeated three times on different dates. Significant differences were observed (F = 11.127, df = 7. 24, p = 0.0054), registering mortality between 3 and 14 days. Steinernema sp3 JCL027 was the strain producing the highest mortality rate (19.3 ± 8 %), followed by H. bacteriophora HNI0100 (5.2 ± 9 %). Thus, we evaluated Steinernema sp3 JCL0270 using a randomized design at 0, 160, 290, 420, 550, 680, 810 IJs/cm2 (n = 12). The experiment was repeated three times on different dates. Significant differences were found among treatments (44 ± 5 %, F = 14.676; df = 6. 21, p = 0.001), with 680 IJs/cm2 producing the highest mortality followed by 810 IJs/cm2 (22 ± 5 %). In conclusion, this alternative must be further explored in search of pesticide use and cost reduction, in addition to young palm loss in a plantation.

Strategus aloeus (COLEOPTERA: SCARABAEIDAE) DAMAGE AND ITS RELATIONSHIP WITH RAINFALL AND HYBRID OIL PALM AGE IN COLOMBIA

“…The natural enemies of S. aloeus include the fungus Metarhizium anisopliae (Metchnikoff) Sorokin (Ascomycota: Hypocreales), which affects the larvae and adults and can be a promising alternative for pest control of this species (Bustillo-Pardey, 2014;Bustillo-Pardey et al, 2016;Valencia et al, 2011), Nudivirus oryctes (Wang et al, 2007); previously called Baculovirus oryctes Huger virus that is pathogenic to S. aloeus adults (Lomer, 1987), and entomopathogenic nematodes that affect the larvae of S. aloeus (Gómez and Sáenz, 2015). In addition, Phileurus sp.…”

Biological Control and Biofertilization of Oil Palm (Elaeis Guineensis Jacq.): Towards Sustainable Production

“…Using pheromones is one of the best tools to combat the weevils Rhynchophorus palmarum, Dynamis borassi, Metamasius hemipterus, and Limnobaris calandriformis, the vectors causing the red ring in palms [58] . The beetle pest, caused by the rhinoceros beetle Strategus aloeus [59,60] , is mainly controlled by conventional pesticides and old palm removal in renewal lots; some attempts to use entomopathogenic nematodes were also performed [61] . Some attempts were performed using Trichoderma isolate for the bud rot disease caused by the bacterium Phytophthora palmivora [62,63] .…”