San Jose scale timing - other methods

	San Jose scale - timing of crawler release and male flight with other methods

The timing of the life cycle of San Jose scale is strongly dependent on temperature and is discussed in the life history. A variety of methods have been used to estimate the timing of male and crawler emergence, in additon to those already described.

Method	Recommendation
Temperature (day degrees (DD) above a threshold	Male flight (1st generation) occurs 139 - 231 DD above 7.3^oC (Hungary). Crawler release (1st generation) occurs 405-577 DD above 7.3^oC (Hungary). (see also life history)
Crop phenology	End of crawler release (1st generation) 60-80 days after full bloom of cherry (Europe).
Date of male flight	Central Otago 2 generations: late October/early November, February/March Nelson 3 generations: late September/early October, January, March/April Hawkes Bay 3 generations: late September/early October, January/early February, March/April
Date of crawler release	1st generation 32 days after male flight, 2nd generation 23 days after male flight (Europe)