ovisacs


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ovisacs

small sacs in the ovarian tissue that contain the immature ovocytes that develop into ova; a graafian follicle.
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Crawlers used in this experiment were obtained from newly developed ovisacs which were transferred from the rearing area to glass tubes (5 cm ht X 1 cm diam) closed with Parafilm[R] and checked daily until the eggs hatched (after hatching nymphs tend to cluster under the ovisac, which is easily seen through the glass).
During their life span they neither laid eggs nor produced ovisacs, indicating no parthenogenetic reproduction in mealybug.
The amount of As-nurpl mRNA in the embryos collected from the ovisacs was much higher than in the activated embryos (Fig.
19,484, n = 22) stored in the ovisacs and available for release.
On 13 Sep 2011 (in the cohort study), adult scales were found to have numerous unhatched eggs in their ovisacs at the study site.
Greater predation on neonate nymphs than on other stages can be expected in the field because the predators can access large numbers of crawling nymphs as they leave female ovisacs.
Newly oviposited nymphs in ovisacs from each of the gravid females were removed daily and the total number of immature per ovisac was counted.