Soil-treatments for control of potato tuber-blight

1969 ◽  
Vol 12 (4) ◽  
pp. 219-221
Author(s):  
A. H. McIntosh
Keyword(s):  
Potato Tuber ◽  
Tuber Blight

scholarly journals Assessment of Barriers to Prevent the Development of Potato Tuber Blight Caused by Phytophthora infestans

Plant Disease ◽  
2001 ◽  
Vol 85 (5) ◽  
pp. 521-528 ◽  
Author(s):  
J. R. Glass ◽  
K. B. Johnson ◽  
M. L. Powelson
Keyword(s):  
Potato Tuber ◽  
Phytophthora Infestans ◽  
Sandy Loam ◽  
Russet Burbank ◽  
Polyethylene Film ◽  
Black Film ◽  
Tuber Infection ◽  
Tuber Blight ◽  
Hill Area ◽  
The Hill

Experiments were conducted in an irrigated, sandy loam soil to evaluate mulches and hill sizes as barriers to prevent the development of potato tuber blight caused by Phytophthora infestans. In mulching experiments, five treatments were applied to field plots of cv. Red LaSoda: 1, no mulch; 2, polyurethane spray foam in an 8-cm-diameter area immediately surrounding the plant stem; 3, black polyethylene film over the entire hill except near the stem; 4, a combination of treatments 2 and 3; and 5, a water-permeable, agricultural textile treated with copper hydroxide applied over the same hill area as in treatment 3. In 1998, the incidence of tuber blight in plots mulched with black film (treatments 3 and 4) averaged 32% compared with 56% in plots without this mulch (treatments 1 and 2). In 1999, incidence of tuber blight in plots with and without black film averaged 9 and 20%, respectively. Mulching the stem area with spray foam (treatments 2 and 3) did not reduce the incidence of blighted tubers when compared with the appropriate control. The copper-treated textile mulch (treatment 5) provided reductions in the incidence of tuber blight similar to those observed with the use of black polyethylene film. In a hill size experiment conducted once in 1998 and twice in 1999, three hill size treatments were established on cvs. Red LaSoda, Shepody, and Russet Burbank. Red LaSoda was the most susceptible and Russet Burbank the least susceptible to tuber blight. Comparison of blight incidence in tubers classified by depth in the hill revealed few differences among the hill size treatments, although over all treatments, tubers covered with more than 15 cm of soil had a lower incidence of blight (1 to 14%) than tubers with less soil cover (13 to 59%). Most tuber infections were apparently initiated in eyes and were not concentrated on a portion of the tuber such as the stolon (proximal) or distal end. The fact that black film and textile mulches reduced tuber infection indicates that inoculum of P. infestans can move from foliage to tubers through soil and that inoculum movement is not limited to large channels in the hill such as those created by the potato stems. The mulch treatments, however, provided only partial protection of tubers, limiting the practicality of such treatments to commercial producers. Hill size treatments had little effect on tuber blight incidence, indicating that adequate suppression of tuber infection in an environment conducive to late blight may be inseparably linked to adequate suppression of the foliar phase.

Incidence of potato tuber blight in Ecuador

2005 ◽  
Vol 82 (2) ◽  
pp. 117-122 ◽  
Author(s):  
Pedro J. Oyarzún ◽  
Carla D. Garzón ◽  
Diego Leon ◽  
Irene Andrade ◽  
Gregory A. Forbes
Keyword(s):  
Potato Tuber ◽  
Tuber Blight

scholarly journals A comparison of tuber slice and whole tuber tests for the assessment of potato resistance to tuber blight Phytophthora infestans (Mont.) de Bary

2013 ◽  
Vol 43 (1-2) ◽  
pp. 95-107 ◽  
Author(s):  
Hanna Zarzycka
Keyword(s):  
Potato Tuber ◽  
Phytophthora Infestans ◽  
Significant Influence ◽  
Fungal Growth ◽  
Depth Of Penetration ◽  
Covered Area ◽  
Tuber Blight ◽  
Potato Resistance ◽  
Different Order ◽  
Cut Rose

The resistance of potato tuber tissues to colonization by <i>Phytophthora infestans</i> was compared in 10 selected cultivars in two trials: on tuber slices and whole tubers with cut rose ends. When resistance to sporulation was used as the discriminating criterion, the selected cultivars segregated in a distinctly different order than when arranged according to other resistance components. Both the tuber slice test and the whole tuber test allowed resistance to sporulation to be assessed in the tested group of cultivars. The results obtained in both trials were reproducible and both criteria, i.e. the percentage of mycelium-covered area as well as sporulation intensity were equally useful for the assessment. No significant influence of the fungal growth though the tuber slice tissue was observed on the assessment of sporulation in comparison to the whole tuber test where the fungus grew directly on the wounded tissue after inoculation. Assessment of the percentage of the area of the tuber slice exhibiting visible necrosis was found to be useless due to the lack of correlation with two criteria of resistance to colonization used in the whole tuber test, i.e. the rate and depth of penetration. The most useful parameter of the whole tuber test appeared to be assessment of the depth of penetration of the tuber tissues. This parameter showed the least variability and good correlation with other criteria used to evaluate resistance to colonization.

Immunolocalization of extensin and potato tuber lectin in carrot, tomato and potato

1996 ◽  
Vol 97 (4) ◽  
pp. 708-718 ◽  
Author(s):  
Shu-xia Li ◽  
Allan M. Showalter
Keyword(s):  
Potato Tuber

scholarly journals Covalent Structures of Potato Tuber Lipases (Patatins) and Implications for Vacuolar Import

2009 ◽  
Vol 284 (15) ◽  
pp. 9764-9769 ◽  
Author(s):  
Karen G. Welinder ◽  
Malene Jørgensen
Keyword(s):  
Potato Tuber

scholarly journals Release of Apical Dominance in Potato Tuber Is Accompanied by Programmed Cell Death in the Apical Bud Meristem

2012 ◽  
Vol 158 (4) ◽  
pp. 2053-2067 ◽  
Author(s):  
Paula Teper-Bamnolker ◽  
Yossi Buskila ◽  
Yael Lopesco ◽  
Shifra Ben-Dor ◽  
Inbal Saad ◽  
...  
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Potato Tuber ◽  
Apical Dominance ◽  
Apical Bud
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