Location: Horticultural Crops Research
2007 Annual Report
Dr. Riga and collaborators conducted the following research towards the agreements objectives:
Field trial: Treatments were applied in 27’ long plots in a ‘Nootka’ red raspberry field (Mr. Ehlers, Lynden, WA): Phenamiphos (Nemacur); Cordon; Vydate; DiTera; and Fosthiazate. Nontreated plots were served as controls. Treatments were applied in the greenhouse (E. Riga, WSU-IAREC): Greenhouse experiment: Brassica carinata (mustard meal) at 0.5% and 1.0% w/w was mixed in potting soil prior to planting; and STO-007 at 1 ounce and STO-008 at 2 ounces per acre applied every two weeks to raspberry plants in 1-gallon pots. Nontreated plants served as controls. Lesion Nematode Results from Greenhouse Trials: In the two greenhouse trials, Brassica carinata mustard meal and STO were used against nematodes, as follows: there was a significant difference between nontreated controls, 56 nematodes per 250 cc soil, and 1% B. carinata treated red raspberries, 13.5 nematodes per 250 cc soil, respectively (P= 0.03); there was no significant difference between nematode densities in the nontreated controls and the plants treated with STO products.
Summary: Vydate and Fosthiazate significantly suppressed root lesion nematodes in the roots and soil; Nemacur was intermediate, while Cordon and DiTera were not effective. There is no significant difference between the fruit weight of the control and the treatments, except Vydate, which reduced fruit yield. Plants treated with Vydate twice in spring 2006 at a rate of 1 gal/A in the row showed phytotoxic symptoms; applications at lower rates were made in spring 2007. The effects of treatments applied in 2006 on growth and yield will be evaluated in 2007 without additional applications.
ADODR Statement: The ADODR met with the cooperating PI and project personnel at meetings during the year and discussed results through phone calls, e-mail, and in person.