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Asian Corn Borer, Ostrinia furnacalisr

Ostrinia furnacalis, Asian corn borer moth is an important insect of maize, millet, mung bean, and many grasses. It is also known as Oriental Corn Borer or Asian Maize Borer.

This insect is geographically  distributed in Afghanistan, Burma, Cambodia, Ceylon, China, India, Indonesia, Jammu and Kashmir, Japan, Korea, Laos, Malaysia, Pakistan, Philippines, Sikkim, Singapore, Taiwan, Thailand, Vietnam, USSR, Australasia  and Pacific islands, Australia, Caroline Islands, Marianas Islands, Papua and New Guinea, and Solomon Islands.

Russell IPM manufactures and supplies pheromone lure, traps and complete monitoring systems for Ostrinia furnacalis, Asian corn borer moth. Pheromone trap data give early warning of the infestation and also will alert the user to low level of infestation before it become serious.

Biology

The life cycle of the pest was 27-46 days with an average of 37.50 days. Eggs are laid by groups under the leaves. Egg period was 3-4 days. There are 5 larval instars, and the period of each instar was 3-7 days. Pupa stage period was 7-9 days, and moth period was 2-7 days. Natural enemies of the pest in South Sulawesi include the egg parasitoid Trichogramma evanescens and larval parasites belonging to Ichneumonidae, Braconidae and Tachinidae. Approximately 71.56-89.80% of the eggs were infected by parasitoids. The percentage of the larvae infected is 1-6%. Predators of the pest include Proreus, Euborellia spp., Lycosa spp., Chrysopa spp. and Orius tristicolor. (Nonci, N. 2004).

Nature of Damage

Small, dark coloured entry holes can be found on the stem or pods. An accumulation of frass around these holes is common. The stem and leaves above the entry holes are wilted. When feeding is completed, pupation occurs within the stem or mung bean pod. Depending on temperature, multiple generations may occur in one season. Maize is also a common host for this pest (AVRDC). Maize yield loss due to Ostrinia furnacalis, was approximately 20-80% (CABI).

Monitoring

Russell IPM manufactures and supplies pheromone lure – the Qlure, traps and complete monitoring systems for Ostrinia furnacalis, the Asian corn borer. 

Pheromone trap data gives early warning of the infestation and will also alert the user to a low level of population before it becomes serious.

The lure can be best applied with the Mothcatcher trap or Delta trap.

Application Guidelines

Lures
Lures can be changed every 4-6 weeks to get the most accurate results.

Lures handling
Pheromone lures are a very sensitive tool. They can be affected by exposure to elevated heat and direct sunshine. Direct touching by hand may cause cross contamination leading to mixed catches in the trap. Some contaminants such as Nicotine May have repellent effect reducing trap catch.

Lure Storage

Store in a cool dry place. Shelf life can vary from 3-36 months depending on the storage temperature. See Technical Data Sheet for further details.

Trap Selection

The Deltra trap is the most sensitive trap to use for monitoring this insect. However, Moth catcher may be used in dusty conditions or in high moth population density.

Trap Density

Do not re-use the trap to monitor different insects as this may lead to mixed catches. One trap for every two hectares of large scale fields of homogenous lands.

Two traps per hectare (2trap/ha) for small holdings and in field of uneven topography.

Trap Position

Place traps near the highest point of the plant using supporting posts approximately 1 meter high, or higher if the crop is higher.

Data and Interpretation

Collect data weekly from the start of the flight of the over wintering generation. During the height of the population more frequent reading may be needed. Decisions on pesticide application should not be taken solely on the trap catch data. Climatic and biological considerations should be taken in account.

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