| 11. | It is occasionally responsible for widespread defoliation of hardwood species.
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| 12. | Defoliation causes most shoots of host plant to dry up.
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| 13. | Both prefer forest environments and often cause severe defoliation.
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| 14. | Stressed trees can also be attacked by psyllids to the point of defoliation.
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| 15. | Continuous defoliation over several years often results in the death of the tree.
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| 16. | Defoliation of alligator weed mats kills the weed and clears the infested waterway.
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| 17. | They may cause heavy defoliation in Ghana and Nigeria.
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| 18. | The most severe damage was defoliation around Kuri Bay.
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| 19. | The larvae cause defoliation of spruce subalpine fir forests.
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| 20. | Potato plants can take a lot of defoliation and still produce a decent crop.
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