As the deadline for phasing out the use of methyl bromide as a fumigant approaches alternative fumigants are being evaluated Sulfuryl fluoride has emerged as a promising alternative and is gaining increasing acceptance in Europe This study showed that sulfuryl fluoride was an effective fumigant for the control of Arhopalus tristis adults at the lowest concentration tested (15 g/m3) while 120 g/m3 was required for full control of A tristis eggs Sulfuryl fluoride also gave total control of Hylastes ater adults and larvae at 15 g/m3 Sulfuryl fluoride showed potential to control the eight fungi tested in this study with a concentration level of at least 30 g/m3 required for full control of the eight fungi tested
The black pine bark beetle (Hylastes ater) and the burnt pine longhorn beetle (Arhopalus ferus) are major insect pests of Pinus radiata in New Zealand and are currently listed as undesirable on imported P. radiata logs from New Zealand by AQISQ, the Chinese quarantine authorities. Any discoveries of these pests could endanger one of the most important export markets for New Zealand logs. Experiments were carried out to examine the efficacy of the non ozone-depleting fumigant phosphine for eliminating these two pests from P. radiata logs at egg, larva and adult life stages. Direct exposure to phosphine at levels as low as 200 ppm for up to 10 days has disinfested the three life stages of both pests. Phosphine has the potential to control both pests in export logs before they arrive in the other countries and may be a replacement fumigant for the ozonedepleting methyl bromide.
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