Early instar larval movement of the Asian corn borer, Ostrinia furnacalis (Guenee) (Lepidoptera:Crambidae), among the different alternate host plants in the Philippines

Issue Date

10-2014

Abstract

The presence of weeds and non-crops in Bt and non-Bt corn production areas is very important because they can serve as alternate host plants for arthropod pests and they should be considered in designing on Insect Resistance Management program in the tropics. When these weeds and non-corn host crops are abundant, they can serve as natural refugia for the ACB and are likely sources of susceptible individuals that can dilute the resistant population from the Bt corn. It is the aim of this paper to determine the behavior of early instar larvae on 15 different alternate host plants. This is done by infesting each host and observing for six hours at 15-minute intervals. Results showed that the biggest percentage of time spent by ACR for locomotion was observed on spiny amaranth, for resting on Job's tears and for spinning or ballooning on cotton and corn. The suitable hosts for feeding were goosegrass, paragrass, sorghum, mungbean, sugarcane, wild sorghum, okra/lady's finger and corn. The results of this study are a significant contribution to the presently limited information on the behavior of early instar ACB larvae on alternate host plants in the Philippines. In addition, this baseline information will give us insights to the greater role of alternate hosts in producing susceptible ACB population for Insect Resistance Management (IRM) for Bt corn. Knowledge on their behavior and movement are valuable information for use in the formulation of appropriate IRM strategy to deploy natural refuge systems compatible with the needs and resources of corn farmers.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

28

Issue

2

Page

204

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

OSTRINIA FURNACALIS; ZEA MAYS; BACILLUS THURINGIENSIS; HOST PLANTS; ALTERNATIVE HOSTS; PESTS OF PLANTS; PHILIPPINES

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