Effect of Temperature on Pratylenchus penetrans Development.

Area of Science:

• Plant Nematology
• Agricultural Science
• Ecology

Background:

• Pratylenchus penetrans is a significant plant-parasitic nematode affecting various crops.
• Understanding its reproductive biology is crucial for developing effective management strategies.

Purpose of the Study:

• To determine the reproductive and developmental rates of Pratylenchus penetrans at different temperatures.
• To establish the thermal requirements for the life cycle of P. penetrans.

Main Methods:

• Reproduction and development of P. penetrans were assessed on genetically transformed ladino clover roots in vitro.
• Egg deposition, juvenile mortality, and life-cycle duration were recorded at temperatures ranging from 17°C to 30°C.

Main Results:

• Egg deposition rates were positively correlated with temperature, peaking between 25°C and 27°C.
• Juvenile mortality was highest at extreme temperatures (17°C, 20°C, 30°C) and lowest at 25°C and 27°C.
• Life-cycle duration decreased significantly with increasing temperature, from 46 days at 17°C to 22 days at 30°C.

Conclusions:

• Pratylenchus penetrans exhibits a wide thermal range for reproduction, but optimal development occurs within a specific temperature window.
• Thermal constants for P. penetrans development were estimated, providing valuable data for population modeling and pest management.