Applying the IDS method to remove seeds infested with the seed chalcid,Megastigmus spermotrophus Wachtl,in Douglas-fir,Pseudotsuga menziesii (Mirb.) Franco |
| |
Authors: | J D Sweeney Y A El-Kassaby D W Taylor D G W Edwards G E Millers |
| |
Institution: | (1) Forestry Canada — Maritimes Region, P.O. Box 4000, E3B 5P7 Fredericton, NB, Canada;(2) Canadian Pacific Forest Products, 8067 East Saanich, Saanichton, BC, Canada;(3) Forestry Canada — Pacific and Yukon Region, 506 West Burnside Road, V8Z 1M5 Victoria, BC, Canada |
| |
Abstract: | Douglas-fir seedlots were treated with the Incubation Drying Separation (IDS) method to test whether seeds infested with the seed chalcid, Megastigmus spermotrophus Wachtl, could be separated from non-infested seeds. Seeds were soaked in distilled water for 24 h, drained, placed in plastic bags and incubated at 15 °C for 3 days. The seeds were dried for either 0.5, 1, or 2 h at 25 °C, and then separated into floaters and sinkers in a water column. An average of 97% of the infested seed floated. The drying period did not affect the separation of infested seeds but significantly fewer sound seeds floated in the seedlots dried for 0.5 h than those dried for 1 h. Germination capacity of IDS-treated seeds did not differ from that of untreated seeds but the germination rate was significantly faster for IDS-treated seeds when all lots were stratified. |
| |
Keywords: | germination capacity insect removal seed treatment |
本文献已被 SpringerLink 等数据库收录! |
|