Effect of Inoculation with Maize Dwarf Mosaic Virus at Several Growth Stages on Yield of Sweet Corn

Gregory, L; Ayers, J. E.

doi:10.1094/pd-66-801

Cited by 11 publications

(10 citation statements)

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“…Yield reduction due to MDM and symptom expression are affected by the growth stage at which sweet corn is infected (5,12,18,25). When late plantings of sweet corn are exposed to large populations of viruliferous aphids, plants can be infected at early stages of host growth.…”

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

“…When late plantings of sweet corn are exposed to large populations of viruliferous aphids, plants can be infected at early stages of host growth. Infection at juvenile growth stages reduces plant height, delays maturity, decreases ear diameter and length, reduces ear weight, and increases the number of missing kernels in the basal end of the ear, which is commonly called butt blanking (5,17,18). Butt blanking results from retarded growth of pollen germ tubes on silks of infected plants (19), and it reduces the marketability of sweet corn used for fresh market and the weight of kernels cut from the cob that are used for processing.…”

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

“…Yields of susceptible sweet corn hybrids can be reduced as much as 40% by MDM (5,17,18,21). Reductions of up to 12% were observed when two sweet corn hybrids were inoculated at various growth stages with maize dwarf mosaic virus (MDMV-A) (5). Yield was reduced as much as 36% when hybrids were inoculated with sugarcane mosaic virus (SCMV-MB) at the four-to fiveleaf stage (17).…”

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

“…Most of the previous research on the effects of MDM on yield evaluated the reactions of susceptible hybrids to MDMV-A or SCMV-MB (5,17,18,21). Although previous studies have demonstrated that MDM reduces yield, it is not apparent that yields of resistant hybrids with varying incidences of symptomatic reactions will be entirely unaffected by infection.…”

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

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Reactions of Sweet Corn Hybrids with Resistance to Maize Dwarf Mosaic

Kerns

Pataky

1997

Plant Disease

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Maize dwarf mosaic (MDM), caused by the sugarcane mosaic subgroup of potyviruses, can substantially reduce yield and ear quality of sweet corn (Zea mays). The effects of strain A of maize dwarf mosaic virus (MDMV-A) and strain MDMV-B of sugarcane mosaic virus (SCMV-MB) on resistant sweet corn hybrids were evaluated. Incidence of symptomatic plants, types of symptomatic responses, yield, and ear quality were compared among 20 hybrids in 1993 and 14 hybrids in 1994. Incidence of symptomatic plants measured at the beginning of harvest ranged from 4 to 100% in 1993 and 1 to 100% in 1994 and differed among hybrids inoculated with MDMV-A and/or SCMV-MB. Hybrids BiGuard, Dallas, HMX 9352, and Topacio had low (<20%) incidences of symptomatic plants when inoculated with MDMV-A, SCMV-B, or MDMV-A/SCMV-MB. Some hybrids had moderate responses, with incidence varying around 25%. Some hybrids appeared to have greater resistance to MDMV-A than to SCMV-MB. The incidence of sectoring plants (i.e., distinct bands or sectors of asymptomatic and symptomatic tissue) was higher for hybrids with high levels of resistance and ranged from 0 to 14% in 1993 and 0 to 83% in 1994. Ear weight of inoculated hybrids, expressed as a percentage of the non-inoculated control, ranged from 84 to 109% in 1993 and from 84 to 105% in 1994. Slope coefficients from regressions of percent ear weight on incidence ranged from -0.085 to -0.15. Butt blanking was associated with high incidence of MDM-symptomatic plants. None of the commercially available MDM-resistant sweet corn hybrids were 100% asymptomatic, but levels of resistance in most of these hybrids were adequate to minimize the effects of MDM on yield.

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Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

Section: R Kerns and J K Pataky Department Of Crop Sciences Umentioning

confidence: 99%

See 2 more Smart Citations

Reactions of Sweet Corn Hybrids with Resistance to Maize Dwarf Mosaic

Kerns

Pataky

1997

Plant Disease

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“…Symptoms induced by MDMV in maize include local and systemic necrosis, systemic mosaic, dwarfing, and occasionally leaf reddening (54,109,110,111). The development of various symptom patterns depend upon host genotype (11,111,139), virus strain (34,109,121), time of inoculation (63,122), and certain environmental factors including temperature (45,67,129) and light (67,129). Infected plants also exhibit numerous physiological and biochemical changes including the formation of viral coded cytoplasmic inclusions (21,57,68,95), unusual aggregates of mitochondria and chloroplasts (57), reduction in transpiration rate (88), decreased ear diameter, length, and width, (20,97), sterility expressed as missing kernels (98), stunting (109), reduction of stalk diameter and strength (73), and a reduction in seed quantity and quality (20,97).…”

Section: Mdmv Is An Important Phytopathological Agent Of Maizementioning

confidence: 99%