Estimation of Vydate C-LV Application Dates at 1,440 DD_41F (800 DD_5C)

For Suppression of Columbia Root-knot Nematode.

Based on Temperature data from Potato (cv Ranger Russet) Plots at HAREC

Updated July 17, 2004

Planting date Plan to apply Vydate on:

March 1 June 3

March 15 June 6

April 1 June 14

April 15 June 23

May 1 July 3

Vydate injection solution should be buffered to pH<5 and applied through chemigation in ½ in water. Applications of 2.1 pts/a should be repeated every two weeks until harvest.

Daily & seasonal degree-day accumulations for Columbia Root-knot Nematode are available on HAREC site http//www.oregonstate.edu/dept/hermiston.

Go to Extension – Nematode Degree-Days

Contacts for questions:

Russ Ingham 541-737-5255, Nick David 541-561-5920,

Phil Hamm 541-567-8321