Registration of FC723 and FC723CMS Monogerm Sugarbeet Germplasm Resistant to Rhizoctonia Root Rot and Moderately Resistant to Cercospora Leaf Spot

2007 ◽  
Vol 1 (1) ◽  
pp. 66-67
Author(s):  
L. Panella ◽  
L.E. Hanson
Keyword(s):  
Leaf Spot ◽  
Root Rot ◽  
Cercospora Leaf Spot ◽  
Rhizoctonia Root Rot ◽  
Moderately Resistant

scholarly journals Resistance to Diseases in Wheat Collection Samples and Somaclonal Variants

2011 ◽  
Vol 39 (No. 1) ◽  
pp. 21-23 ◽  
Author(s):  
L.G. Tyryshkin ◽  
N.A. Tyryshkina
Keyword(s):  
Leaf Rust ◽  
Leaf Spot ◽  
Root Rot ◽  
Water Solution ◽  
Spot Blotch ◽  
Common Root ◽  
Seedling Resistance ◽  
Common Root Rot ◽  
Glume Blotch ◽  
Moderately Resistant

More than 2000 wheat collection samples were studied for seedling resistance to 4 diseases. Noncoincidence of results obtained after inoculation of leaf segments placed on water solution of benzimidazole (60 ppm) and intact plants was found for 3 foliar diseases (leaf rust – Puccinia recondita, dark brown leaf spot blotch – Bipolaris sorokiniana and septoria glume blotch – Septoria nodorum). Sixty-three entries were resistant to leaf rust; 26 of them have gene for resistance Lr26 (non-effective under field condition), 25 – gene Lr24, 4 – gene Lr19, 8 – gene Lr9 and 2 – gene Lr41. Samples 181-5, Fielder, Butte 66, Raj 1972 and Soisson were moderately resistant to spot blotch; 181-5 – to common root rot and Moking and MN 81330 – to glume blotch. Very high level of partial resistance to 3 diseases was found in late generations of somaclonal lines of weakly and moderately resistant initial genotypes: to leaf rust in lines of cv. Spica, to leaf spot blotch – in lines of 181-5, to common root rot – in that of 181-5 and cv. Vera; moderate resistance to glume blotch was identified in lines of cv. Spica.   

scholarly journals Nonpathogenic Binucleate Rhizoctonia spp. and Benzothiadiazole Protect Cotton Seedlings Against Rhizoctonia Damping-Off and Alternaria Leaf Spot in Cotton

2005 ◽  
Vol 95 (9) ◽  
pp. 1030-1036 ◽  
Author(s):  
Suha Jabaji-Hare ◽  
Stephen M. Neate
Keyword(s):  
Disease Control ◽  
Leaf Spot ◽  
Root Rot ◽  
Virulent Strain ◽  
Systemic Resistance ◽  
Damping Off ◽  
Binucleate Rhizoctonia ◽  
Rhizoctonia Root Rot ◽  
Seedling Rot ◽  
Induction Of Resistance

Recent reports have shown induction of resistance to Rhizoctonia root rot using nonpathogenic strains of binucleate Rhizoctonia spp. (np-BNR). This study evaluates the biocontrol ability of several np-BNR isolates against root and foliar diseases of cotton in greenhouse trials, provides evidence for induced systemic resistance (ISR) as a mechanism in this biocontrol, and compares the disease control provided by np-BNR with that provided by the chemical inducer benzothiadiazole (BTH). Pretreatment of cotton seedlings with np-BNR isolates provided good protection against pre- and post-emergence damping-off caused by a virulent strain of Rhizoctonia solani (AG-4). Seedling stand of protected cotton was significantly higher (P < 0.05) than that of nonprotected seedlings. Several np-BNR isolates significantly reduced disease severity. The combination of BTH and np-BNR provided significant protection against seedling rot and leaf spot in cotton; however, the degree of disease reduction was comparable to that obtained with np-BNR treatment alone. Significant reduction in leaf spot symptoms caused by Alternaria macrospora occurred on cotyledons pretreated with np-BNR or sprayed with BTH, and the np- BNR-treated seedlings had significantly less leaf spot than BTH-treated seedlings. The results demonstrate that np-BNR isolates can protect cotton from infections caused by both root and leaf pathogens and that disease control was superior to that observed with a chemical inducer.

scholarly journals Key Plant, Key Pests: Azalea (Rhododendron spp.)

EDIS ◽  
2018 ◽  
Vol 2018 (6) ◽  
Author(s):  
Juanita Popenoe ◽  
Caroline Roper Warwick ◽  
Jacqueline Bourdon ◽  
David J. Norman
Keyword(s):  
Leaf Spot ◽  
Root Rot ◽  
Gall Midge ◽  
Iron Chlorosis ◽  
Cercospora Leaf Spot ◽  
General Management ◽  
Root Rots ◽  
Lace Bug ◽  
Management Recommendations

This series of Key Plant, Key Pests publications are designed for Florida gardeners, horticulturalists, and landscape professionals to help identify common pests associated with common Florida flora. This publication, the sixth in the Key Plant, Key Pests series, helps identify the most common pests found on the Azalea. This publication provides information and general management recommendations for the azalea caterpillar, azalea lace bug, azalea leafminer, rhododendron gall midge, azalea gall, cercospora leaf spot, mushroom root rot, ovulinia petal blight, wet root rots, and iron chlorosis.

Alternaria and Cercospora Leaf Spot Diseases of Niger (Guizotia abyssinica Cass.) – A Traditional Tribal Crop of South Gujarat, India, with Cost Benefit Ratio in Relation to Different Fungicides

2018 ◽  
Vol 51 (3) ◽  
pp. 89-99
Author(s):  
P.B. Sandipan ◽  
P.K. Jagtap ◽  
M.C. Patel
Keyword(s):  
Field Experiment ◽  
Seed Yield ◽  
Leaf Spot ◽  
Foliar Spray ◽  
Cost Benefit ◽  
Research Station ◽  
Guizotia Abyssinica ◽  
Cercospora Leaf Spot ◽  
Benefit Ratio ◽  
Cost Benefit Ratio

Abstract Niger (Guizotia abyssinica Cass.) is an important minor oil seed crop grown in dry areas grown mostly by tribal and interior places as life line of tribal segment. Tribal people mainly use its oil for cooking purpose, above than that there were also other uses. Hence, the niger crop should be protected from the infection. The crop is affected by number of fungal diseases. Therefore, a field experiment was formulated for three years with the four replications at the Niger Research Station (NRS) at Navsari Agricultural University (NAU), Vanarasi, Navsari (Gujarat) on the foliar diseases of GN-1 variety of niger crop. In this experiment, six different fungicides along with one control have been evaluated to control the Alternaria and Cercospora leaf spot diseases, out of which all the fungicidal treatments were significantly superior over the control. Here, foliar spray on the incidence of diseases was compared with the control (without any treatment). All the fungicidal treatments were significantly superior over the control to reduce Alternaria and Cercospora leaf spot diseases of Niger crop. Treatment of Carbendazim + Mancozeb (0.2 %) with two sprays first from the initiation of the disease and second after the interval of 15 days recorded the lowest incidence of Alternaria (14.56) and Cercospora (14.94) leaf spot diseases of niger and recorded the highest seed yield 337 seed yield kg/ha along with the net return with cost benefit ratio graph.

On the Damage of Cercospora Leaf Spot of Sugar Beets Caused by Cercospora beticola Sacc.

1968 ◽  
Vol 34 (1) ◽  
pp. 1-6
Author(s):  
Wataru IIDA ◽  
Kazuichi KUDO ◽  
Takashi KIMIGAFUKURO
Keyword(s):  
Leaf Spot ◽  
Cercospora Beticola ◽  
Cercospora Leaf Spot ◽  
Sugar Beets
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