Management of Spodoptera litura (F.) and S. exigua (Hubner) on onion by mass trapping of the moths and timing of interventions in farmers' fields
Issue Date
10-2004
Abstract
The frequency of insecticide spraying, level of damage and yield of onion in farmers' fields were compared with the same parameters in researcher-managed plots. Farmer cooperators were allowed to follow their pest control practices while in the researcher-managed plot, application of insecticides was based on the number of male S. litura and S. exigua moths caught in sex pheromone-baited traps. Frequency of spraying in farmer cooperator's fields ranged from 2 to 6 times with a mean of 4.4 while it was 2 to 3 times and mean of 2.6 in the researcher's plot. Percent damaged leaves taken four times during the crop season ranged from 3.7 to 4.7% and 3.6 to 6.3% in researcher's and farmer's plot, respectively. There was no significant difference in the mean yield between farmer's plot and the researcher's plot. Although the farmers applied more insecticides than the researcher, the levels of insect damage and yield were not different. This study further demonstrated that sex pheromone-baited trap is an important tool for effective timing of control interventions against S. litura and S. exigua on onion.
Source or Periodical Title
Philippine Entomologist
ISSN
0048-3753
Volume
18
Issue
2
Page
173-174
Document Type
Article
Frequency
semi-annually
Language
English
Recommended Citation
Arida, G . S.; Punzal, B. S.; Duca, A. A.; and Rajotte, E. G., "Management of Spodoptera litura (F.) and S. exigua (Hubner) on onion by mass trapping of the moths and timing of interventions in farmers' fields" (2004). Journal Article. 5623.
https://www.ukdr.uplb.edu.ph/journal-articles/5623
En – AGROVOC descriptors
SPODOPTERA LITURA; SPODOPTERA EXIGUA; ALLIUM CEPA; PLANT PESTS; INSECTICIDES; SEX PHEROMONES; FARMERS; CROP YIELD