Abundance and distribution of cacao pod borer (Conopomorpha cramerella Snell) in small holder farms in North Sumatra, Indonesia

Issue Date

10-2004

Abstract

The occurrence and abundance of caco pod borer, Conopomorpha cramerella Snell, and its natural enemies, were observed in three districts (Langkat, Deliserdang, Asahan) of North Sumatra for 6 months (December 2002 to May 2003). Based on six monthly observations, the population of C. cramerella eggs, larvae and pupae were higher in Langkat than in Asahan and Deliserdang. Pods measuring 10-15 cm long had the highest number of eggs laid while the bigger ones had the least. The larval and pupal populations in farms of different sizes were comparable, but higher in Langkat and Deliserdang than in Asahan district. Five predator species (lacewing, ant, asilid fly and two spider species) were found in the cacao field but no egg or larval parasitoids. One larval-pupal parasitoid, identified as Goryphus sp., was found with a parasitization rate of 6.83%. Farmers' interview revealed that the cacao pod borer pest management practice of Langkat farmers was largely with the use of insecticides while the Asahan farmers relied on biological control. Asahan district had the lowest pod borer infestation due to more abundant natural enemies.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

18

Issue

2

Page

177

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

CONOPOMORPHA CRAMERELLA; NATURAL ENEMIES; PLANT PESTS; INFESTATION; INDONESIA

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