Chemical basis for the population reduction of the Asian corn borer on corn entwined with Ipomoea triloba L.
Issue Date
11-2000
Abstract
The oviposition behavior of Ostrinia furnacalis on corn in the presence of Ipomoea triloba was assessed in laboratory and field experiments while the origin of olfactory stimuli for habitat location of O. furnacalis was investigated in a Y-tube olfactometer. Two host plant resistance mechanisms were found to reduce corn borer oviposition: (1) the production of volatile attractants from corn is suppressed due to entwining of I. triloba on corn and, (2) the production of a volatile repellent is increased when I. triloba is entwined on corn. Experienced female corn borer moths discriminated between headspace volatiles collected from either potted corn, I. triloba, corn entwined by I. triloba or wired corn and their respective controls (solvent). Phenological factors and stress, like that produced by wiring, reduced the attractiveness of corn to corn borer moths. Chemical analysis of the headspace volatiles supports the behavioral data. The chemical profile of plant volatiles emitted by corn entwined by I. triloba showed a marked difference from those emitted by I. triloba grown separately. Entwining of I. triloba or wiring on corn produced similar changes in the ratios of headspace volatiles. Laboratory olfactory tests showed the repellency of 1-methylethyl propyl disulfide and the attractiveness of a blend of some hydrocarbons which are characteristics of corn and I. triloba headspace. Response to these chemicals was dosage-dependent. Oviposition was reduced, not inhibited, when moths were exposed to 1-mrthylethy propyl disulfide. Changes in the volatile allelochemistry of corn, I. triloba and changes in the chemical ecology of the corn - I. triloba complex consequently affect Asian corn borer moth behavior.
Source or Periodical Title
Journal of the International Society for Southeast Asian Agricultural Sciences (Journal of ISSAAS)
ISSN
0859-3132
Volume
6
Issue
2
Page
28-42
Document Type
Article
Frequency
semi-annually
Physical Description
tables
Language
English
Recommended Citation
Calumpang, S. M. F.; Medina, J. R.; Ohsawa, K.; and Mitsui, T., "Chemical basis for the population reduction of the Asian corn borer on corn entwined with Ipomoea triloba L." (2000). Journal Article. 5266.
https://www.ukdr.uplb.edu.ph/journal-articles/5266
En – AGROVOC descriptors
OSTRINIA FURNACALIS; IPOMOEA; REPELLENTS; OVIPOSITION; ATTRACTANTS; CHEMICAL ECOLOGY; SEMIOCHEMICALS; POPULATION DECREASE