plant pests - Page 25 of 53

A B C D E F G H I J K L M N O P Q R S T V W X Y Z

Honeydew

Honeydew – sugar-rich sticky liquid secreted by aphids.
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The hornet mimic hoverfly belongs to the hoverflies and with its length of 2.5 cm is larger than the average hoverfly.
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Horse chestnut; tree that can grow over twenty-five feet tall with a broad crown. Continue reading

Horse chestnut bleeding canker is caused by the bacterium Pseudomonas syringae and causes rust-brown spots on the trunk. Continue reading

The horse chestnut leaf miner is a butterfly of the leafminer family and lives mainly on horse chestnut trees. Continue reading

The horse chestnut scale belongs to the soft scales. This scale insect has only one generation per year.
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Horsetail belongs to the horsetail family (Equisetaceae) . It is a perennial that grows to a maximum height of 40 cm.
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Horsetail spray is a fermented brew of horsetail (Equisetum arvense).
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Hydrangeas are deciduous shrubs that can grow up to 3 meters high.
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Hydrangea scales belong to the scale insects. Young Hydrangea scales are inconspicuous, light brown and quite flat.
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