Masters Theses

Date of Award

6-1981

Degree Type

Thesis

Degree Name

Master of Science

Major

Entomology and Plant Pathology

Major Professor

Paris L. Lambdin

Committee Members

L. E. Klostermeyer, M. L. Pan, C. D. Pless

Abstract

Adults of Podisus maculiventris (Say) were stored at 5, 10, 15 and 27°C from one to eight weeks, and three-day-old eggs were stored for seven days. The number of females surviving cold storage was significantly higher than the number of males, although both were lower than survival at 27°C. No males or females survived storage after six or seven weeks, respectively. For each week, mean longevity for males and females was significantly lower for those individuals removed from cold storage when compared with the control. The mean number of eggs laid by females exposed to cold storage and the result-ing eclosion and number of second instars was significantly lower than that of the control. Percent eclosion and the percent reaching second instar were comparable to the control. Eclosion was significantly lower for those eggs placed in cold storage when compared with the control. Eggs placed in cold storage hatched three to five days after removal from storage compared with the control in which eclosion occurred four to six days after oviposi-tion. Cold storage could be used in order to stockpile adults and eggs to facilitate laboratory rearing and maintenance, or in field releases to augment or establish a population of P. maculiventris. Larger numbers of cold-stored adults would simply be needed than if non-stored individuals were used.

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