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    The control of stored products pests in the South Island of New Zealand : a two part study

    Ferguson, A. J.
    Abstract
    This study is in two parts. The first reports the results of a mail questionnaire which was sent to 180 companies storing agricultural produce in the South Island of New Zealand. Sixty-eight percent were returned and showed that most respondents had at some time had pest infestations. Ten percent of respondents suffered regularly from pests and most stores took control measures. Annual expenditure for pest control ranged from zero to $4,800 per company. The second part was a laboratory trial where the new insecticides pirimiphos-methyl and difluron were compared with the traditional maldison, to control the stored products weevil Sitophilus granarius (L.). A range of concentrations of each insecticide dust was mixed into wheat in 500 ml Jars. Adult S. granarius were added, and their mortality and the number of progeny hatching for two generations was found. Weight changes in the wheat were also measured. Pirimiphos-methyl was the most toxic and the cheapest insectivide to use. Concentrations of 0.5 ppm and above controlled the infestation. Difluron was half as toxic as pirimiphos-methyl and was the most expensive of the three insecticides to use. Maldison was one-fifth as toxic as pirimiphos-methyl and about twice as expensive to use.... [Show full abstract]
    Keywords
    stored product pests; pest control; insect pests; insect pests; agricultural production; insecticides; pirimiphos-methyl; difluron; weevils; Sitophilus granarius (L.); chemical control; New Zealand
    Fields of Research
    070308 Crop and Pasture Protection (Pests, Diseases and Weeds); 060808 Invertebrate Biology; 079902 Fertilisers and Agrochemicals (incl. Application)
    Date
    1979
    Type
    Thesis
    Access Rights
    Digital thesis can be viewed by current staff and students of Lincoln University only. Print copy available for reading in Lincoln University Library.
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    • Department of Pest Management and Conservation [646]
    • Theses and Dissertations with Restricted Access [2202]
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