Factors Affecting the Ratio of Female to Male of Pinewood Nematodes Bursaphelenchus xylophilus (Steiner & Buhrer) Nickle

The pinewood nematode Bursaphelenchus xylophilus (B. xylophilus) is responsible for a devastating disease of pine forests. Its pathogenicity closely related to the numbers individual B. xylophilus. ratio female male (sex ratio) key understanding population change in this species. sex varies widely, but it unclear how affected by environmental changes. ratios nematodes, isolated from different samples wild, varied between 0.93 and 2.20. Under laboratory conditions, maternal age did not affect progeny. A good poor nutritional status was associated with reduction progeny 1.85 1.41, which speculated result primary ratio. Thus, effectively maintains changes adjusts on basis nutrition.