. Injurious insects : how to recognize and control them . Insect pests; Insect pests. PLAST-LICE IXJCRIWG THE FOLIAGE 319 To control, spray witli tobacco extract or with kerosene emulsion as soon as the lice are first seen. The Currant Aphis {Mijzus rihis Linn.) Like most other plant lice this species causes a curling up of the foliage infested. Both currants and gooseberries arc subject to attack. The leaves curl tightly, and their upper surfaces show distinct raised areas or blisters, between the veins. The hce are one twelfth of an inch long, mottled green, and have red eyes. The pest passe
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. PLAST-LICE IXJCRIWG THE FOLIAGE 319 To control, spray witli tobacco extract or with kerosene emulsion as soon as the lice are first seen. The Currant Aphis {Mijzus rihis Linn.) Like most other plant lice this species causes a curling up of the foliage infested. Both currants and gooseberries arc subject to attack. The leaves curl tightly, and their upper surfaces show distinct raised areas or blisters, between the veins. The hce are one twelfth of an inch long, mottled green, and have red eyes. The pest passes the winter as shining eggs, attached to the woody parts of the plants. Contact sprays, such as tobacco ex- tract or kerosene emulsion, will kill them, but shoidd be appUed before the leaves are badlv Fig 490. —Work of the Currant Aphis. Original. The Grapevine Aphis (Macrosiphum riticola Thos.) Dusky, soft-bodied plant hce with greenish legs cluster on the tender leaves and >'0ung shoots of grapeA^ines. They appear in the earh' part of the season, and usually are not noticed after growth is well estabUshed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
