الفهرس 
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Abstract
1- TEMPERATURE:
Egg stage:
a)The time required for completion of embryogenesis decreased as the temperature increased, from 10 days at 150G to 2 days at 350C . statisticaIIy there are no sig nnificant differences between vaIues of mean incubation period at 20, 25, 30 and 350C.
a)The threshold of development was 9.50C.
c)The average thermal units required for the development with in the normal zone 920 to 30C)was 41 day –degrees.
d)The constant temperature in the range of 20C to 30C is the favorable zone for the eggs to develop and hatch.