Abstract
The movement of vermiform stages of Rotylenchulus reniformis in response to a temperature gradient of 1°C per cm was investigated in 4 cm diam tubes containing 0.75% water agar or moist sand graded to 150-250 μm and 250-425 μm particle sizes. Nematodes previously stored at 30°C exhibited a temperature preferendum, or eccritic temperature, of 30°C and nematodes stored at 17°C exhibited a preferendum of 23°C in both matrices. In sand of 250-425 μm particle size, most nematodes moved 10 cm downward within 17 h. Rapid downward movement occurred regardless of moisture content or moisture gradient direction. Only living nematodes moved downward and 90% of 1,000 live nematodes that were videotaped as they descended in a narrow channel of water descended in a head downward postition.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
