Effects of four fungicides on survival and growth of containerized Douglas-fir seedlings: greenhouse performance

1980 ◽  
Vol 10 (3) ◽  
pp. 423-425
Author(s):  
Walter G. Thies ◽  
Peyton W. Owston ◽  
Dian C. Hansen
Keyword(s):  
Disease Control ◽  
Control Strategies ◽  
Douglas Fir ◽  
Phytotoxic Effects ◽  
Survival And Growth

Several disease control strategies were tested on Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) seedlings grown in a greenhouse-shadehouse facility in western Oregon. Potting mixture was exposed to two pasteurization treatments combined factorially with four fungicides (benomyl, captan, fenaminosulf, and ethazol) and three application schedules (pregermination drench, postgermination drenches, and a combination of pre- and post-germination drenches). Both pasteurization of the potting mixture and applications of fenaminosulf caused statistically significant phytotoxic effects.

scholarly journals Root Growth Potential and Microsite Effects on Conifer Seedling Establishment in Northern Idaho

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 597
Author(s):  
Jacob A. Reely ◽  
Andrew S. Nelson
Keyword(s):  
Root Growth ◽  
Douglas Fir ◽  
Seedling Quality ◽  
Growth Potential ◽  
Larix Occidentalis ◽  
Root Growth Potential ◽  
Western Larch ◽  
Neighborhood Conditions ◽  
Seedling Performance ◽  
Survival And Growth

Environmental conditions and seedling quality interact to produce complex patterns of seedling survival and growth. Root growth potential (RGP) is one metric of seedling quality that can be rapidly measured prior to planting, but the correlation of RGP and seedling performance is not consistent across studies. Site factors including microsite objects that cast shade and competing vegetation can also influence seedling performance. We examined the effects of RGP, presence/absence of a microsite object, and competition cover on the survival and growth of three native conifers to the Inland Northwest, USA, over 5 years. We found that RGP had no effect on the survival or growth of western larch (Larix occidentalis), Douglas fir (Pseudotsuga menziesii var. glauca), and grand fir (Abies grandis) at a mesic north aspect site and a xeric south aspect site. Comparatively, the presence of a microsite increased the odds of survival by 37% for western larch and 158% for grand fir, while the absence of forb cover increased the odds of survival of western larch by 72% and of grand fir by 26%. Douglas fir was less sensitive to microsites and competition. The strong effects of neighborhood conditions around seedlings help inform silvicultural practices to enhance the establishment of western larch and grand fir, including planting seedlings near shading objects and competition control, while these practices may not be as important for Douglas fir.

scholarly journals Rotavirus in infant-toddler day care centers: Epidemiology relevant to disease control strategies

1988 ◽  
Vol 113 (3) ◽  
pp. 435-441 ◽  
Author(s):  
Alfred V. Bartlett ◽  
Randall R. Reves ◽  
Larry K. Pickering
Keyword(s):  
Disease Control ◽  
Day Care ◽  
Control Strategies ◽  
Day Care Centers

scholarly journals Crown Gall of Grape: Biology of Agrobacterium vitis and the Development of Disease Control Strategies

Plant Disease ◽  
1998 ◽  
Vol 82 (12) ◽  
pp. 1288-1297 ◽  
Author(s):  
Thomas J. Burr ◽  
Carlo Bazzi ◽  
Sandor Süle ◽  
Leon Otten
Keyword(s):  
Disease Control ◽  
Crown Gall ◽  
Control Strategies ◽  
Agrobacterium Vitis

scholarly journals Induced Resistance for Plant Disease Control: Maximizing the Efficacy of Resistance Elicitors

2005 ◽  
Vol 95 (12) ◽  
pp. 1368-1373 ◽  
Author(s):  
Dale Walters ◽  
David Walsh ◽  
Adrian Newton ◽  
Gary Lyon
Keyword(s):  
Disease Control ◽  
Induced Resistance ◽  
Management Practices ◽  
Control Strategies ◽  
Plant Growth Promoting Rhizobacteria ◽  
Complete Control ◽  
Plant Disease Control ◽  
Plant Growth Promoting ◽  
Significant Disease ◽  
Best Fit

Plants can be induced to develop enhanced resistance to pathogen infection by treatment with a variety of abiotic and biotic inducers. Biotic inducers include infection by necrotizing pathogens and plant-growth-promoting rhizobacteria, and treatment with nonpathogens or cell wall fragments. Abiotic inducers include chemicals which act at various points in the signaling pathways involved in disease resistance, as well as water stress, heat shock, and pH stress. Resistance induced by these agents (resistance elicitors) is broad spectrum and long lasting, but rarely provides complete control of infection, with many resistance elicitors providing between 20 and 85% disease control. There also are many reports of resistance elicitors providing no significant disease control. In the field, expression of induced resistance is likely to be influenced by the environment, genotype, and crop nutrition. Unfortunately, little information is available on the influence of these factors on expression of induced resistance. In order to maximize the efficacy of resistance elicitors, a greater understanding of these interactions is required. It also will be important to determine how induced resistance can best fit into disease control strategies because they are not, and should not be, deployed simply as “safe fungicides”. This, in turn, will require information on the interaction of resistance elicitors with crop management practices such as appropriate-dose fungicide use.

Sheep disease control strategies

1984 ◽  
Vol 115 (22) ◽  
pp. 582-582
Author(s):  
J. Done
Keyword(s):  
Disease Control ◽  
Control Strategies
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