Author: U. GOZEL AND I.H. ELECKCIOGLU

Publishing Date: 2005

E-ISSN: 0255-7576

Volume 23 Issue 2

ABSTRACT:

The study was conducted to investigate the effect of plant parasitic nematodes viz., Pratylenchus thornei and Heterodera avenae on agronomic characters and yield of some wheat varieties in East Mediterranean region of Turkey, during two consecutive growing seasons. Reproduction rate of Pratylenchus thornei and Heterodera avenae were also determined. Monthly population dynamics of P. thornei was observed in treated and untreated plots in both growing seasons of wheat. Nematode populations decreased following nematicide applications, before and after sowing.

During the first year (1998-99) at Dogankent, nematicide treatments showed 19.9 % yield increase of Seyhan 95 variety whereas the yield increase in Panda, Ceyhan 99, Genc 99 and Adana 99 varieties were – 2.6, 1.2, 4.7 and 7.1 % respectively. At Haciali 29 % yield increase was observed of Genc 99 variety whereas the yield increase in Adana 99, Seyhan 95, Panda and Ceyhan 99 varieties were 6.8, 10.2, 23 and 23.5 %, respectively. In Tasci treatments
resulted 32.4 % yield increase on Genc 99 variety whereas the yield increase in Adana 99, Panda, Ceyhan 99 and Seyhan 95 varieties were 7.1, 16.4, 22.6 and 28.8 %, respectively.

In the second year (1999-2000), the yield of the variety Ceyhan 99 decreased in nematicide treated plots. The highest yield increase was 14.7 % in Adana 99, whereas the yield increase of Dogankent 1, Genc 88, Genc 99, Golia, Lirasa, Ozdemirbey, Panda, Seyhan 95, were 1.1, 8.3, 7.1, 7.3, 14, 7.4, 7.7, 13.3 and 0.6 %, respectively. About 1.3 % higher yield was obtained in control plot than treated plots in Ceyhan 99 variety.