Incidence abundance and natural enemies of the coconut leaf beetle in Cavite / Ma. Jerlyn M. Mendoza.

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Indang, Cavite : 2007. Cavite State University- Main Campus,Description: xxiii, 80 pages : 28 cm. illustrationsContent type:
  • text
Media type:
  • unmediated
Carrier type:
  • volume
Subject(s): DDC classification:
  • 632.7  M52 2007
Online resources: Production credits:
  • College of Arts and Science (CAS)
Abstract: MENDOZA, MA. JERLYN MENDOZA. "Incidence, Abundance And Natural Enemies Of The Coconut Leaf Beetle (Brontispa longissima) In Cavite". Undergraduate Thesis. Bachelor of Science in Biology, Cavite State University, Indang, Cavite. April 2007. Adviser: Dr. Josefina R. Rint. The study was conducted to assess the incidence, abundance and natural enemies of coconut leaf beetle (Brontispa longissima). Specifically, it aimed to: describe the external features of coconut leaf beetle; assess the seasonal abundance of coconut leaf beetle; document the damages caused by coconut leaf beetle; identify the natural enemies associated with coconut leaf beetle; correlate the population between coconut leaf beetle and natural enemies; and compare the level of abundance of coconut leaf beetle among the three towns of Cavite. A descriptive survey method was used to fully describe the damage of coconut leaf beetle which was conducted at Dasmarinas, Silang and Indang, Cavite. The number of trees selected was based on abundance of the damaged plants. Four young open and unopened leaves were observed on ten trees which were three to five-years old. Data gathering and monitoring of pest and pest damages were done for a period of 12 months to establish the seasonal abundance and extent of damage inflicted by the coconut leaf beetle. The organisms associated with coconut beetle were: earwig, weaver ants, spider and lizard. The external feature of coconut leaf beetle was described, and the damages inflicted by the coconut leaf beetle on coconut were characterized. Population of coconut leaf beetle increased to its peak from February to July and declined during August to January. The adults and larvae population of coconut leaf beetle were affected by relative humidity in Dasmarinas. Air temperature was the critical factor on the adult population fluctuation in Silang, while the larval population was significantly affected by rainfall in Indang. Pest population was inhibited by natural enemies which was more prominent in Dasmarinas and Indang. Indang gave the highest population count of weaver ants but the presence of the earwig as predator of coconut leaf beetle was also evident most of time during observation periods.
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Theses / Manuscripts Theses / Manuscripts Ladislao N. Diwa Memorial Library Theses Section Non-fiction 632.7 M52 2007 (Browse shelf(Opens below)) Link to resource Room use only T-3554 00007289

Thesis (BS Biology) Cavite State University.

Includes bibliographical references.

College of Arts and Science (CAS)

MENDOZA, MA. JERLYN MENDOZA. "Incidence, Abundance And Natural Enemies Of The Coconut Leaf Beetle (Brontispa longissima) In Cavite". Undergraduate Thesis. Bachelor of Science in Biology, Cavite State University, Indang, Cavite. April 2007. Adviser: Dr. Josefina R. Rint.
The study was conducted to assess the incidence, abundance and natural enemies of coconut leaf beetle (Brontispa longissima). Specifically, it aimed to: describe the external features of coconut leaf beetle; assess the seasonal abundance of coconut leaf beetle; document the damages caused by coconut leaf beetle; identify the natural enemies associated with coconut leaf beetle; correlate the population between coconut leaf beetle and natural enemies; and compare the level of abundance of coconut leaf beetle among the three towns of Cavite. A descriptive survey method was used to fully describe the damage of coconut leaf beetle which was conducted at Dasmarinas, Silang and Indang, Cavite. The number of trees selected was based on abundance of the damaged plants. Four young open and unopened leaves were observed on ten trees which were three to five-years old. Data gathering and monitoring of pest and pest damages were done for a period of 12 months to establish the seasonal abundance and extent of damage inflicted by the coconut leaf beetle. The organisms associated with coconut beetle were: earwig, weaver ants, spider and lizard.
The external feature of coconut leaf beetle was described, and the damages inflicted by the coconut leaf beetle on coconut were characterized. Population of coconut leaf beetle increased to its peak from February to July and declined during August to January. The adults and larvae population of coconut leaf beetle were affected by relative humidity in Dasmarinas. Air temperature was the critical factor on the adult population fluctuation in Silang, while the larval population was significantly affected by rainfall in Indang. Pest population was inhibited by natural enemies which was more prominent in Dasmarinas and Indang. Indang gave the highest population count of weaver ants but the presence of the earwig as predator of coconut leaf beetle was also evident most of time during observation periods.

Submitted to the University Library 05-16-2007 T-3554

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