Study on the Ovicidal Effects of 4 Mineral Source Pesticides on the Winter-Form Pear Psylla
- Received Date: 14/05/2021
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Key words:
- Psylla chinensis /
- ovicide /
- lithium sulphur mixture /
- sulphur· /
- mineral oil
Abstract: In order to provide a basis for screening mineral source pesticides against winter-form pear psylla (Psylla chinensis), lithium sulphur mixture, sodium rosinate, mineral oil and lithium sulphur·mineral oil were used as the experiment materials, with the chemical pesticide pyriproxyfen as the control.The results showed that the LC50 of lithium sulphur mixture, sodium rosinate, mineral oil, lithium sulphur·mineral oil and pyriproxyfen was 1.14 Be°, 1 107.98 mg/L, 3 564.13 mg/L, 1 202.24 mg/L and 75.85 mg/L, respectively. Of the four pesticides with mineral sources, lithium sulphur mixture showed the highest ovicide efficiency, followed by sulphur·mineral oil, sodium rosinate and mineral oil. The ovicide effect of mineral pesticides against pear psylla eggs was superior to that of the chemical pesticide. Thus, lithium sulphur mixture and sulphur·mineral oil are recommended to be used as the ovicide agents before germination in the prevention and control of pear psylla.