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adult female aphides appear Apple applied Aspidiotus attack Australian Bug bark become beetle beneath Black Scale blight-proof blisters body Bryobia California Cape Colony Cape Gooseberry Cape Town citrus citrus trees colony colour common Department of Agriculture destroy destructive diluted eggs emulsion enlarged entomologist farmers foliage food plants fruit growers fruit trees fumigation fungus gardens Graaff-Reinet Harvest Mites hatch honey-dew hydrocyanic acid hydrocyanic acid gas imported inch in length injurious insecticides knapsack pumps large number larvæ lemons lime liquid Locust Long Scale male scale Mealy Bugs mites Mytilaspis nozzles nursery stock observed occur Occurrence in Cape Oleander Oleander Scale orange Paarl paraffine paraffine emulsion Peach Pear pest pounds probably Purple Scale Red Scale Red Spider Remedies resin wash scale insects species specimens spray pump spread Stellenbosch sulphur surface swarms twigs U.S.A. Dept Vedalia winged Woolly Aphis yellow young insects young trees