| 31. | Some scale insect species evolved symbiotically with some ant species.
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| 32. | The scale insects " Brachyscelis munita " and " Opisthoscelis pisiformis " form galls.
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| 33. | Other lady beetles feed on scale insects and mealybugs.
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| 34. | As with honeydew secreted by aphids and scale insects.
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| 35. | Young scale insects, called crawlers, are less easily seen but are more easily wiped away.
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| 36. | Scale insects of all ages feed by sucking sap.
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| 37. | Other insect pests include scale insects, aphids and earwigs.
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| 38. | Most predatory caterpillars feed on eggs of other insects, aphids, scale insects, or ant larvae.
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| 39. | Scale insects, for example, have a crawler stage where horticultural oil can easily kill them.
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| 40. | Scale insects are the host of Candidatus " Fritschea eriococci " ( strain Elm ).
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