Occurrence and seasonal abundance of cabbage webworm, Hellula undalis (Fab.) (Lepidoptera: Pyralidae)

Issue Date

4-2004

Abstract

The occurrence and abundance of the cabbage webworm (CWW), Hellula undalis (Fab.), on cabbage was determined for four consecutive croppings at the Central Experiment Station, University of the Philippines Los Banos (CES, UPLB) from August 1993 to April 1994. In all croppings, CWW was noted from seedling to heading stage and infestation started while seedlings were still in the seedbed. CWW was more abundant during the wet season (first and second croppings). The population of cabbage webworm was at its peak from the late vegetative to pre-heading stage in the first cropping (August 26 to October 30, 1993) while in the second cropping (September 30 to December 9, 1993), from pre-heading to heading stage. During the dry season, CWW was most abundant at heading stage (third cropping, December 9, 1993 to February 17, 1994), while in the fourth cropping (February 7 to April 28, 1994), it was during the vegetative stage. The larvae feed on the developing shoots, thus adversely reducing the production of marketable heads. The cabbage webworm was also found in Kinabuhayan, Dolores, Quezon; Sta Catalina, San Juan and Cabugao, Ilocos Sur; and in Batac, Ilocos Norte, but was absent in the cabbage-growing areas sampled in Benguet and Mt. Province. CWW was also observed attacking cauliflower shoots. This was the first study on the occurrence and abundance of CWW in the Philippines.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

18

Issue

1

Page

64-73

Document Type

Article

Frequency

semi-annually

Physical Description

illustrations; graph, tables

Language

English

En – AGROVOC descriptors

HELLULA UNDALIS; LEPIDOPTERA; PYRALIDAE; CABBAGES; INSECTA; SEASONAL CROPPING; CROPPING SYSTEMS

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