Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1985. / Vita. Abstract. Includes bibliographical references (leaves 85-99). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1982. / Vita. Abstract. Includes bibliographical references (leaves 95-101). Also available via the Internet.

Thesis (Ph. D.)--Virginia Polytechnic Institute, 1955. / Vita. Abstract. Includes bibliographical references (leaves 51-52). Also available via the Internet.

Thesis (Ph. D.)--Virginia Polytechnic Institute, 1957. / Vita. Abstract. Includes bibliographical references (leaves 71-73). Also available via the Internet.

Dissertation (Ph.D.)--Auburn University, 2005. / Abstract. Vita. Includes bibliographic references.

M. S.

Movement behavior of Blattella germanica (L.) was investigated using two mark-recapture techniques 1) marking field collected populations of adult German cockroaches with a unique number, and 2) releasing strains of genetically marked German cockroaches to observe nymphal movement. Movement by adult cockroaches was studied by marking 3299 field collected German cockroaches in eight apartments. allowed for population. Adults were marked with Liquid Paper'. This recognition of specific individuals in the After marking, cockroaches were released at their original site of capture. Biological data was recorded on both nymphs and adults. Results indicate that movement of adult German cockroaches between apartments is minimal. Movement within apartments is greater, but not substantial. Movement appears to be linked to carrying capacity of the habitat (=apartment). When a vital resource -- food, water, or harborage -- becomes limited, adult movement can be detected when populations are large. Trapped populations in focus and non-focus apartments are spatially distributed in different ways. German cockroaches in non-focus apartments are trapped predominately in traditional sites of infestation kitchen and bathroom areas, with 90% of the collections occurring in these sites. In focus apartments trap collections indicate that one-third of the population is found in areas traditionally identified as non-preferred sites of infestation. Movement of German cockroach nymphs was investigated using releases of genetically marked strains of cockroaches. Collections of marked individuals were limited, suggesting that the strains used, especially eye color mutants, were not competitive in field environments. Results of this study were inconclusive. The feasibility of applying the aesthetic injury level concept to control programs within the urban environment rather than to pests occurring on the exterior was investigated. A random survey was conducted in non-elderly public housing projects in Roanoke, VA, Norfolk, VA, and Baltimore, MD. One hundred surveys were taken in each of the cities. The results of the survey indicate that the aesthetic injury level concept can not be successfully applied to control programs for insect pests occurring inside the home. are dependent upon the Tolerances extent of are variable, and the infestation experienced by each resident. It is speculated that as infestation levels decline, tolerance of the pest would also decline. / Ph. D.

The food and water requirements of the female German cockroach for reproduction as well as the effects of food and water deprivations during the reproductive cycle were studied. The data obtained are useful both in advancing our knowledge about the basic biology of this species, in addition to determining whether sanitation should continue to be stressed in cockroach pest management programs. Experimental animals were reared under constant humidity and temperature with a controlled photoperiod. Females were deprived of food or water following maturation, mating, first oothecal hatch, or during the egg-case carrying period. Effects on survival and reproduction were noted. Water deprivation increased mortality at all periods of the cycle tested, with additional effects on the reproductive cycle. Females survived food deprivations much better although direct effects on reproduction were observed. There were delays in the reproductive cycle along with decreased oothecal hatches. Females carrying oothecal survived the deprivations better than females in other reproductive states. It appears that female B. <i>germanica</i> can survive without food or water for short periods although, normally, reproduction will not occur in the absence of either. The effects of food and water deprivations vary greatly with both the length of time the resource is unavailable and the period of the reproductive cycle during which the resource is unavailable. Since food and water seem to be critical to reproduction of the German cockroach, a continued emphasis on sanitation appears justified. / M.S.

Thesis--Auburn University, 2009. / Abstract. Vita. Includes bibliographic references (p.120-131).

Thesis (M.S.)--Virginia Polytechnic Institute and State University. / Vita. Abstract. Includes bibliographical references (leaves 55-60). Also available via the Internet.