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 1
- Downloads 0
Sensory quality of custard tart as affected by varying levels of Mabolo (Dispyros blancoi A. DC) Flesh
Mabolo (Diospyros blancoi A. DC) is an underutilized fruit in the Philippines. To add value and maximize the utilization of this nutritional fruit, the potential of mabolo for the production of highly saleable baked prod...
Production and marketing practices of rabbit raisers in Bulacan, Philippines
The rabbit is a promising livestock animal as it has nutritious meat, can adapt to a variety of climates and has prolificacy. However, it is not as well-studied in the Philippines as other livestock or poultry species, p...
Rice blast incidence and morphological variation of Magnaporthe oryzae, Cav. in Ebonyi State, Nigeria
Blast disease is one of the major threats to rice production globally. This study investigates the prevalence, incidence, severity, damage index and morphological variation of blast disease in lowland rice in nine local...
Estimation of carbon stocks of mangrove forests along the Carigara Bay in Leyte, Philippines
Mangrove forest ecosystems are known to sequester large quantities of carbon, becoming a significant carbon source when disturbed. This paper presents a quantification in aboveground (standing trees, palm, shrub, standin...
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...