The tolerance of three Steinernematid nematodes to desiccation and the effects of several types of additives on their mobility

• Main Author: Cleary, L. Basil, 1957-
• Other Authors: Memorial University of Newfoundland. Dept. of Biology
• Format: Thesis
• Language: English
• Published: 1991
• Subjects: Insect pests > Biological control; Nematoda; Insecticides > Toxicology; Newfoundland studies; University of Newfoundland
• Online Access: http://collections.mun.ca/cdm/ref/collection/theses3/id/34383

Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Biology Bibliography: leaves 52-58 This was a two-part study. In the first part, differences in the ability of three Steinernematid nematodes to remain mobile at various saturation deficit levels were investigated. A TI50 value (time required for 50% of the nematodes within a sample to reach immobility) was obtained for each saturation level and each species. In the second part, the potential of 11 types of additives to enhance nematode mobility (increase the TI50 value) at various saturation deficit levels was evaluated. Results indicated that each species had significantly different TI50 values for each saturation level. Steinemema feltlae (All strain), Stcinernema sp. Nfld. strain No. 1(L1C strain), and Steinemema bibionis had the highest, medium and lowest values, respectively. The additives tested separated into groups based on their TI50 values. The best group with the highest TI50 values consisted of base, heavy and 2251 additives. The second group, klearol, pyronyl and Exxon, and the third group, soybean, savol, cottonseed, sunspray and citrus, had the median and lowest TI50 values, respectively. The additives of the first group possessed the lowest relative viscosity values, while those of the second and third groups possessed the median and highest viscosity values, respectively.