Archive image from page 34 of The culture of pot-plants in. The culture of pot-plants in rooms, greenhouses, & frames cultureofpotplan00davi Year: greenhouses ( POT-PLANTS IN GREENHOUSES AND FRAMES 23 first be well soaked in water. Unless this is done, the material of which the pots are composed is so absorbent that it may abstract so much moisture from the soil that the roots are dried up. Fig. 9.—Examining the roots of a Fern, infested with the root-feeding mealy bug. When plants turn sickly, the cause may be obvious at a glance. Insects may be seen on the leaves, or the nature of the in

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Archive image from page 34 of The culture of pot-plants in. The culture of pot-plants in rooms, greenhouses, & frames cultureofpotplan00davi Year: greenhouses ( POT-PLANTS IN GREENHOUSES AND FRAMES 23 first be well soaked in water. Unless this is done, the material of which the pots are composed is so absorbent that it may abstract so much moisture from the soil that the roots are dried up. Fig. 9.—Examining the roots of a Fern, infested with the root-feeding mealy bug. When plants turn sickly, the cause may be obvious at a glance. Insects may be seen on the leaves, or the nature of the injury may clearly indicate that they are the culprits. The leaves may be covered with dust, or with a film of oil from a lamp or from recent painting; or spots or other symptoms may point to fungoid disease. On the other hand, the cause

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