Cold treatment against eggs of forest pests
Tests were conducted in Japan to assess the susceptibility of eggs of several forest pests to a cold storage treatment at 5°C: Semanotus japonicus, Callidiellum rufipenne (EPPO Alert List), Monochamus alternatus (EPPO A1 quarantine pest) , Cryphalus fulvus, Xyleborus pfeili and Pissodes nitidus. Eggs were exposed at 5°C for 7, 14, 21, 28, 35, 42, 60 and 90 days. Probit analysis gave the following LT95 values: 18.6 days for X. pfeili eggs, 28.1 for C. fulvus, 42.3 for M. alternatus, 57.5 for C. rufipenne, 68 for P. nitidus and 68.8 for S. japonicus. It is considered that 90 days would be needed to achieve complete mortality for the eggs of S. japonicus and P. nitidus at 5°C.
Sources
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Naito, H.; Soma, Y.; Kawakami, F.; Machii, K.; Miyamoto, I.; Takeo, W. (2002) Susceptibility of eggs of forest insect pests to low temperature.
Research Bulletin of the Plant Protection Service Japan, no. 38, 1-4.
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