scholarly journals Storage root yield of sweetpotato as influenced by sweetpotato leaf curl virus and its interaction with sweetpotato feathery mottle virus, and sweetpotato chlorotic stunt virus in Kenya

2019 ◽  
Author(s):  
Bramwel W. Wanjala ◽  
Elijah M. Ateka ◽  
Douglas W. Miano ◽  
Jan W. Low ◽  
Jan F. Kreuze
Keyword(s):  
Yield Loss ◽  
Virus Disease ◽  
Block Design ◽  
Mottle Virus ◽  
Root Yield ◽  
Randomized Complete Block Design ◽  
Significant Yield ◽  
Leaf Curl Virus ◽  
Kenyan Strain ◽  
Leaf Curl

AbstractThe effect of a Kenyan strain of sweetpotato leaf curl virus (SPLCV) and its interactions with sweetpotato feathery mottle virus (SPFMV), and sweetpotato chlorotic stunt virus (SPCSV) on root yield was determined. Trials were performed during two seasons using varieties contrasting in their resistance to sweetpotato virus disease, ‘Kakamega’ and ‘Ejumula’, in a randomized complete block design with sixteen treatments replicated three times. The treatments included plants graft inoculated with SPLCV, SPFMV and SPCSV alone and in possible dual or triple combinations. Yield and yield related parameters were evaluated at harvest. Results showed marked differences in the effect of SPLCV infection on the two varieties: ‘Ejumula’, which is susceptible to SPFMV and SPCSV, suffered no significant yield loss from SPLCV infection, whereas ‘Kakamega’, which is more resistant to SPFMV and SPCSV, suffered an average of 47% yield loss, despite only mild symptoms occurring in both varieties. These results highlight the variability in sensitivity to SPLCV between sweetpotato cultivars as well as a lack of correlation of SPLCV related symptoms with susceptibility to the virus. In addition, they underline the lack of correlation between resistance to the RNA viruses SPCSV and SPFMV and DNA virus SPLCV.

scholarly journals Storage Root Yield of Sweetpotato as Influenced by Sweetpotato leaf curl virus and Its Interaction With Sweetpotato feathery mottle virus and Sweetpotato chlorotic stunt virus in Kenya

Plant Disease ◽  
2020 ◽  
Vol 104 (5) ◽  
pp. 1477-1486
Author(s):  
Bramwel W. Wanjala ◽  
Elijah M. Ateka ◽  
Douglas W. Miano ◽  
Jan W. Low ◽  
Jan F. Kreuze
Keyword(s):  
Yield Loss ◽  
Virus Disease ◽  
Block Design ◽  
Mottle Virus ◽  
Yield Response ◽  
Yield Reduction ◽  
Root Yield ◽  
Moderately Resistant ◽  
Leaf Curl Virus ◽  
Leaf Curl

In this study, the effect of a Kenyan strain of Sweetpotato leaf curl virus (SPLCV) and its interactions with Sweetpotato feathery mottle virus (SPFMV) and Sweetpotato chlorotic stunt virus (SPCSV) on root yield was determined. Trials were performed during two seasons using varieties Kakamega and Ejumula and contrasting in their resistance to sweetpotato virus disease in a randomized complete block design with 16 treatments replicated three times. The treatments included plants graft inoculated with SPLCV, SPFMV, and SPCSV alone and in possible dual or triple combinations. Yield and yield-related parameters were evaluated at harvest. The results showed marked differences in the effect of SPLCV infection on the two varieties. Ejumula, which is highly susceptible to SPFMV and SPCSV, suffered no significant yield loss from SPLCV infection, whereas Kakamega, which is moderately resistant to SPFMV and SPCSV, suffered an average of 47% yield loss from SPLCV, despite only mild symptoms occurring in both varieties. These results highlight the variability in yield response to SPLCV between sweetpotato cultivars as well as a lack of correlation of SPLCV-related symptoms with yield reduction. In addition, they underline the lack of correlation between resistance to the RNA viruses SPCSV and SPFMV and the DNA virus SPLCV. [Formula: see text] Copyright © 2020 The Author(s). This is an open access article distributed under the CC BY 4.0 International license .

scholarly journals Estimation of yield loss in sunflower due to new sunflower leaf curl virus disease at different stages of crop growth

2015 ◽  
Vol 8 (1) ◽  
pp. 138-141 ◽  
Author(s):  
DEEPA DEEPA ◽  
GURURAJ SUNKAD ◽  
M.R. GOVINDAPPA ◽  
M.K. NAIK ◽  
S.R. SURESH
Keyword(s):  
Yield Loss ◽  
Virus Disease ◽  
Crop Growth ◽  
Leaf Curl Virus ◽  
Leaf Curl

Yield loss in relation to cotton leaf curl virus disease in BT cotton hybrid in north-Western India

2021 ◽  
Vol 58 (4) ◽  
pp. 728-734
Author(s):  
Rupesh Kumar Arora ◽  
Manpreet Singh ◽  
Paramjit Singh ◽  
Jagdish Arora
Keyword(s):  
Yield Loss ◽  
Virus Disease ◽  
Cotton Leaf ◽  
Western India ◽  
Bt Cotton ◽  
Cotton Leaf Curl Virus ◽  
Cotton Hybrid ◽  
Leaf Curl Virus ◽  
North Western ◽  
Leaf Curl

A monogenic dominant resistance for leaf curl virus disease in chilli pepper (Capsicum annuum L.)

2019 ◽  
Vol 116 ◽  
pp. 115-120 ◽  
Author(s):  
Hament Thakur ◽  
S.K. Jindal ◽  
Abhishek Sharma ◽  
M.S. Dhaliwal
Keyword(s):  
Capsicum Annuum ◽  
Virus Disease ◽  
Chilli Pepper ◽  
Capsicum Annuum L ◽  
Leaf Curl Virus ◽  
Leaf Curl

scholarly journals Length of Efficacy for Control of Curly Top in Sugar Beet With Seed and Foliar Insecticides

Plant Disease ◽  
2016 ◽  
Vol 100 (7) ◽  
pp. 1364-1370 ◽  
Author(s):  
Carl A. Strausbaugh ◽  
Erik J. Wenninger ◽  
Imad A. Eujayl
Keyword(s):  
Sugar Beet ◽  
Host Resistance ◽  
Seed Treatment ◽  
Field Experiments ◽  
Block Design ◽  
Root Yield ◽  
Pyrethroid Insecticides ◽  
Beet Curly Top Virus ◽  
Randomized Complete Block Design ◽  
Untreated Check

Curly top in sugar beet caused by Beet curly top virus (BCTV) is an important yield-limiting disease that can be reduced via neonicotinoid and pyrethroid insecticides. The length of efficacy of these insecticides is poorly understood; therefore, field experiments were conducted with the seed treatment Poncho Beta (clothianidin at 60 g a.i. + beta-cyfluthrin at 8 g a.i. per 100,000 seed) and foliar treatment Asana (esfenvalerate at 55.48 g a.i./ha). A series of four experiments at different locations in the same field were conducted in 2014 and repeated in a neighboring field in 2015, with four treatments (untreated check, Poncho Beta, Asana, and Poncho Beta + Asana) which were arranged in a randomized complete block design with eight replications. To evaluate efficacy, viruliferous (contain BCTV strains) beet leafhoppers were released 8, 9, 10, or 11weeks after planting for each experiment, which corresponded to 1, 2, 3, and 4 weeks after Asana application. Over both years, in 30 of 32 observation dates for treatments with Poncho Beta and 14 of 16 observation dates for Asana, visual curly top ratings decreased an average of 41 and 24%, respectively, with insecticide treatments compared with the untreated check. Over both years, in eight of eight experiments for treatments with Poncho Beta and six of eight experiments for Asana, root yields increased an average of 39 and 32%, respectively, with treatment compared with the untreated check. Over both years, the Poncho Beta treatments increased estimated recoverable sucrose (ERS) yield by 75% compared with the untreated check for weeks 8 and 9. By week 10, only the Poncho Beta + Asana treatment led to increases in ERS in both years, while the influence of increasing host resistance may have made other treatments more difficult to separate. When considering curly top symptoms, root yield, and ERS among all weeks and years, there was a tendency for the insecticides in the Poncho Beta + Asana treatment to complement each other to improve efficacy.

scholarly journals Ty-6, a major begomovirus resistance gene on chromosome 10, is effective against Tomato yellow leaf curl virus and Tomato mottle virus

2019 ◽  
Vol 132 (5) ◽  
pp. 1543-1554 ◽  
Author(s):  
Upinder Gill ◽  
John W. Scott ◽  
Reza Shekasteband ◽  
Eben Ogundiwin ◽  
Cees Schuit ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Tomato Yellow Leaf ◽  
Mottle Virus ◽  
Yellow Leaf ◽  
Chromosome 10 ◽  
Leaf Curl Virus ◽  
Leaf Curl

scholarly journals Effects of sweet potato feathery mottle virus, sweet potato chlorotic stunt virus and their co-infection on sweet potato yield in Western Burkina Faso

2019 ◽  
Vol 4 (1) ◽  
pp. 758-766
Author(s):  
E. B. Tibiri ◽  
K. Somé ◽  
J. S. Pita ◽  
F. Tiendrébéogo ◽  
M. Bangratz ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Sweet Potato ◽  
Virus Disease ◽  
Block Design ◽  
Potato Yield ◽  
Mottle Virus ◽  
Enzyme Linked Immunosorbent Assay ◽  
Yield Reduction ◽  
Potato Varieties ◽  
Western Burkina Faso

AbstractTo determine the effects of sweet potato feathery mottle virus (SPFMV), Sweet potato chlorotic stunt virus (SPCSV) and their co-infection on sweet potato yield, twelve sweet potato varieties were assessed in a hotspot area in Western Burkina Faso. The experiment was carried out in a randomized complete-block design with the twelve varieties in three replications. Data were collected on plant growth parameters, plant virus symptoms and yield parameters. Additional testing for selected sweet potato viruses was done using a nitrocellulose membrane enzyme-linked immunosorbent assay (NCM-ELISA) and RT-PCR. SPFMV and SPCSV were the viruses detected in this study. Varieties Djakani and Ligri were virus-free and had the highest average yields out of twelve sweet potato varieties assessed. Field monitoring indicated that 58% of plants were found to be virus-infected. The results suggest that severe symptoms were associated with sweet potato virus disease (SPVD) and yield reduction. However, the interaction of SPCSV with other viruses, which may result in synergistic negative effects on sweet potato yield and quality, needs further research.

Streptomyces pactum Act12 controls tomato yellow leaf curl virus disease and alters rhizosphere microbial communities

2019 ◽  
Vol 55 (2) ◽  
pp. 149-169 ◽  
Author(s):  
Yulong Li ◽  
Qiao Guo ◽  
Yunzhou Li ◽  
Yifan Sun ◽  
Quanhong Xue ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Virus Disease ◽  
Tomato Yellow Leaf ◽  
Yellow Leaf ◽  
Leaf Curl Virus ◽  
Leaf Curl ◽  
Streptomyces Pactum
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