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Abstract
The habits, host range, and life cycle of Parlatoria pittospori Mask. are dicussed.
Pinus shelter belts infested by Parlatoria proved to be the source of the scale insects on apples. Topping the trees in the shelter belts to a height of approximately 45 ft, and then spraying with a 3 per cent intermediate oil, reduced the scale insect population to a low level and kept the fruit free from scale insects.
Dispersal of the crawlers of P. pittospori was studied. Greased plates which were placed throughout the orchard trapped windborne crawlers up to a distance of 250 yd from the host Pinus radiata Don. Weekly counts showed crawlers moving from November to May, with peak numbers in December. The maximum number of crawlers trapped/12 in. sq. in a 24-hour period was 130.
Preventive sprays of both carbaryl and azinphos-methyl, which were applied during the season to apple trees, were not successful in keeping the fruit free of scale insects.
