Measurements of the incubation period of corn earworm eggs. Luckmann, W. Journal of Economic Entomology, 56(1):60–62, 1963.
Measurements of the incubation period of corn earworm eggs [link]Paper  doi  abstract   bibtex   
Data were obtained on the length of the incubation period of 1,157 eggs of the corn earworm, Heliothis zea (Boddie), in the laboratory and in the field during 1960 and 1961. From studies of the development of eggs incubated in the laboratory at constant temperatures of 60º, 66º, 75º, 85º, and 90ºF., a straightline base temperature of 54ºF. was determined for the calculation of degree hours required for egg hatching. When the 54º base was used, the average length of the incubation period in the laboratory experiments was determined as 1,824 degree hours. Eggs incubated in the field hatched in 1,844 degree hours. The formula for calculating degree hours is presented.
@article{luckmann_measurements_1963,
	title = {Measurements of the incubation period of corn earworm eggs},
	volume = {56},
	issn = {1938-291X},
	url = {https://academic.oup.com/jee/article-abstract/56/1/60/2207392},
	doi = {10.1093/jee/56.1.60},
	abstract = {Data were obtained on the length of the incubation period of 1,157 eggs of the corn earworm, Heliothis zea (Boddie), in the laboratory and in the field during 1960 and 1961. From studies of the development of eggs incubated in the laboratory at constant temperatures of 60º, 66º, 75º, 85º, and 90ºF., a straightline base temperature of 54ºF. was determined for the calculation of degree hours required for egg hatching. When the 54º base was used, the average length of the incubation period in the laboratory experiments was determined as 1,824 degree hours. Eggs incubated in the field hatched in 1,844 degree hours. The formula for calculating degree hours is presented.},
	number = {1},
	journal = {Journal of Economic Entomology},
	author = {Luckmann, WH},
	year = {1963},
	pages = {60--62}
}

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