Degree of damage and infestation of coconut leaf beetle Brontispa longissima (Gestro) on seedlings of selected coconut varietie
Journal Title: Annals of Tropical Research - Year 2021, Vol 43, Issue 2
Abstract
The Coconut Leaf Beetle, scientifically known as Brontispa longissima (Gestro), is an introduced species that is becoming an alarming pest of coconuts in the Philippines. The infestation caused by this pest is damaging to all stages of coconut growth. This study was conducted to assess the degree of damage and infestation caused by Brontispa longissima on the seedlings of 10 selected tall and dwarf coconut varieties in the National Coconut Research Center at Visayas State University, Leyte, Philippines. Among the selected varieties, seedlings of Baybay Tall (green and brown) and Albuera Dwarf varieties succumbed to more damage by B. longissima beetles compared with the other varieties observed with 41-80% of the first openned leaf area damaged. Seedlings of Malayan Yellow Dwarf and Malayan Red Dwarf varieties had the least damage with 0-20% of the first openned leaf area damaged. The high damage ratings of Baybay Tall and Albuera Dwarf were expected because these varieties had high infestation rates and harbored the most numbers of B. longissima adults, eggs, and larval stages, which indicated the preference of B. longissima for these varieties. The developmental period of B. longissima in Baybay Tall and Albuera Dwarf of 44 days and 45 days on the average, respectively, was shorter than in other varieties, indicating that these are suitable and preferred hosts. Baybay Tall seemed to be the most preferred variety. The beetles had least preference for Malayan Yellow Dwarf and Malayan Red Dwarf varieties.
Authors and Affiliations
Gladys R. Cabelin, Maria Juliet C. Ceniza
Keywords
Related Articles
- EP ID EP755549
- DOI https://doi.org/10.32945/atr4323.2021
- Views 22
- Downloads 0
Surfacing development needs of a marginal upland community through participatory tools: The case of village in Samar, Philippines
Efforts to alleviate the productivity of marginal uplands necessitate the use of participatory approaches to identify development needs of the community. However, despite the popularity of participatory methods for asses...
The effects of different tillage practices on soil properties, yield and pest incidence of various Sweet Corn (Zea Mays L. Var. Saccharata) varieties
Conservation tillage is one of the crop production adaptation strategies for conserving soil and mitigating climate change. This study aimed to evaluate the effects of different tillage practices on the yield, soil prope...
Indications of enhanced soil ecosystem functions in polyculture reforested grassland
A lot of work has been doneto evaluate the effects of biodiversity on ecological functions in polyculture plantings. But attention is rarely given to soil ecosystem functions such as carbon (C) sequestration and nitrogen...
Effects of cassava (Manihot esculenta Crantz) density under rice-cassava intercropping in the west of Côte d’Ivoire
In western Côte d’Ivoire, the rice-based cropping system is characterized by cassava intercropping where the rice yield decreases with high densities of cassava. Hence, the need to determine the optimum densities of the...
Effect of ginger extract and sugar level in the sensorial quality and acceptability of Sinaging processed from swamp taro (Cyrtosperma chamissonis)
This study aimed to evaluate the sensory quality and acceptability of Sinaging as affected by the different levels of ginger extract and calamay sugar, obtain the optimum combination of ginger extract and calamay sugar,...