Fungicide Efficacy in Prevention of Root Rot Incited by Phytophthora cactorum and Phytophthora drechsleri in Fraser Fir Seedlings

被引：4
|
作者：
Hoover, Benjamin K. [1 ]
机构：
[1] Penn State Univ, Dept Hort, University Pk, PA 16802 USA
来源：
HORTTECHNOLOGY | 2012年 / 22卷 / 04期
关键词：
Abies fraseri; dimethomorph; mefenoxam; fosetyl-Al; CINNAMOMI; RESISTANCE; METALAXYL; CRYPTOGEA;
D O I：
10.21273/HORTTECH.22.4.470
中图分类号：
S6 [园艺];
学科分类号：
0902 ;
摘要：
The most serious disease problem in fraser fir (Abies fraseri) Christmas tree production is phytophthora root rot (PRR). The efficacies of six fungicide treatments in preventing PRR incited by Phytophthora cactorum and P. drechsleri in 2-year-old fraser fir seedlings were evaluated in 2010 and 2011 in central Pennsylvania. The study examined five fungicide drench treatments [dimethomorph, fosetyl-aluminum (fosetyl-Al), hydrogen dioxide, mefenoxam, propamocarb hydrochloride] and one soil spray treatment (mefenoxam) in raised planting boxes. Dimethomorph applied on 14-day intervals prevented foliar disease symptoms and mortality in fraser fir seedlings exposed to either P. cactorum or P. drechsleri. One-time application of fosetyl-Al or mefenoxam were effective at times in preventing foliar disease symptoms and mortality in fraser fir seedlings exposed to P. drechsleri but were not as effective against P. cactorum.
引用
收藏
页码：470 / 475
页数：6
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