Responses to temperature in nematodes. I. Mechanism of heat tolerance in Helicotylenchus dihystera

Authors

  • M. I. Azmi

Abstract

Temperature is an important factor in relation to the geographical distribution of nematode species. Bird and Wallace (1965) observed that Meloidogyne hapla is more prevalent in cooler climes whereas M. javanica frequently occurs in hotter regions and has a higher optimum temperature for survival than M. hapla. EI-Sherif and Mai (1968,1969) found some species to react within heat gradients whereas others did not. Recently Azmi and Jairajpuri (1977) found that sudden changes in temperature resulted in posture changes of H elicotylenchus indicus due to abnormal neuro-muscular activity. Further experiments, which are reported here, have been undertaken to examine the effect of temperature on the activity, mortality and postural changes and locomotion of H. dihystera (Cobb) Sher.

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Published

1979-12-15

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Section

Articles