| 1. | Larvae expel frass from their tunnels near the original oviposition site.
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| 2. | A small mound of frass and silk covers the entrance hole.
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| 3. | The mine consists of a corridor with a central frass line.
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| 4. | The frass fills most of the corridor In the first section.
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| 5. | The frass fills most of the corridor in the first section.
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| 6. | The frass is concentrated in a broad, irregular central line.
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| 7. | The frass is brown and dispersed and almost fills the corridor.
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| 8. | The first part is entirely filled with brown, dispersed frass.
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| 9. | The frass in the second half of the gallery is dispersed.
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| 10. | The frass is concentrated in the basal part of the blotch.
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मोबाइल