Yellow and purple nutsedge and coffee senna as hosts of common plant nematodes in Florida

Mendes, Maria de Lourdes; Dickson, D. W.; Crow, William T.

doi:10.21307/jofnem-2020-094

Cited by 2 publications

(1 citation statement)

References 11 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kaur et al (2007) found sicklepod to be a good host for M. enterolobii , whereas our research determined sicklepod was a poor host. Belle et al (2017) found purple nutsedge to be resistant to M. incognita , and Mendes et al (2020) concluded that both yellow and purple nutsedge are susceptible to M. enterolobii and M. incognita , while the present work determined purple nutsedge to be susceptible to M. incognita but resistant to M. enterolobii ( Table 1 ).…”

Section: Discussionsupporting

confidence: 44%

Evaluation of Weed Species for Host Status to the Root-Knot Nematodes Meloidogyne enterolobii and M. incognita Race 4

Schwarz,

Chitra,

Jennings

et al. 2024

Journal of Nematology

View full text Add to dashboard Cite

Weeds that compete with valuable crops can also host plant-parasitic nematodes, acting as a source of nematode inoculum in a field and further damaging crops. The host status of 10 weed species commonly found in North Carolina, USA, was determined for the root-knot nematodes Meloidogyne enterolobii and M. incognita race 4 in the greenhouse. Each weed species was challenged with 5,000 eggs/plant of either M. enterolobii or M. incognita race 4, with five replicate plants per treatment in two separate greenhouse trials. Root galling severity and total number of nematode eggs per root system were recorded 60 days after inoculation. Reproduction factor (Rf = final nematode population/initial nematode population) was calculated to determine the host status of each weed species to M. enterolobii and M. incognita race 4. Four weed species (Datura stramonium, Digitaria sanguinalis, Senna obtusifolia, and Cyperus esculentus) were poor hosts (Rf < 1) to both nematode species, and roots of these weed plants did not display galling. Four weed species (Ipomoea hederacea, Amaranthus palmeri, Portulaca pilosa, and Ipomoea lacunosa) were hosts (Rf > 1) to both nematode species, and all had observable root gall formation. Sida rhombifolia and Cyperus rotundus were poor hosts to M. enterolobii but susceptible hosts to M. incognita. This study documents a differential host status of some common weeds to M. enterolobii and M. incognita race 4, and these results highlight the necessity of managing root-knot nematodes through controlling weeds in order to protect valuable crops.

show abstract

Section: Discussionsupporting

confidence: 44%

Evaluation of Weed Species for Host Status to the Root-Knot Nematodes Meloidogyne enterolobii and M. incognita Race 4

Schwarz,

Chitra,

Jennings

et al. 2024

Journal of Nematology

View full text Add to dashboard Cite

show abstract

Occurrence and Distribution of Meloidogyne spp. in Fields Rotated with Sweetpotato and Host Range of a North Carolina Population of Meloidogyne enterolobii

Wong,

Ye,

Thiessen

et al. 2024

Plant Disease

View full text Add to dashboard Cite

Root-knot nematodes (RKN, Meloidogyne spp.) are some of the most economically important and common plant parasitic nematodes in North Carolina (NC) cropping systems. Soil samples collected from fields planted with crops rotated with sweetpotato [Ipomoea batatas (L.) Lam.] in 39 NC counties in 2015-2018 were processed at the NC Nematode Assay Laboratory. The occurrence of second-stage juvenile (J2) RKN populations was examined based on collection year, month, county, and previous planted crop. The highest number of RKN positive samples originated from Cumberland (53%), Sampson (48%), and Johnston (48%) counties. The highest average RKN population density was detected in Sampson (147 J2/500 cm3 soil) and Nash (135 J2/500 cm3 soil) counties, while Wayne (7 J2/500 cm3 soil) and Greene (11 J2/500 cm3 soil) counties had the lowest average RKN population density. Meloidogyne enterolobii is a new invasive species that is impacting sweetpotato growers of NC. The host status of a NC population of M. enterolobii, the guava-root knot nematode, was determined by examining eggs per gram of fresh root (ER) and the final nematode egg population divided by the initial population egg count (reproductive factor, RF) in greenhouse experiments. This included eighteen vegetable, field, cover crops and weed species. The tomato ‘Rutgers’ was used as a susceptible control. Cabbage ‘Stonehead’, pepper ‘Red bull’, and watermelon ‘Charleston gray’ and ‘Fascination’ were hosts and had similar mean ER values to the positive control, ranging from 64 to 18,717. Among field crops, cotton, soybean ‘P5018RX’, and tobacco were hosts with ER values that ranged from 185 to 706. Members of the Poaceae family such as sweet corn (Zea mays) and sudangrass (Sorghum x drummondii) were non-hosts to M. enterolobii and the mean ER values ranged from 1.85 to 7. The peanut ‘Tifguard’ and winter wheat (Triticum aestivum) also had lower ER values than the vegetable hosts. Growers should consider planting less susceptible or non-hosts such as peanut, sudangrass, sweet corn, and winter wheat in 2-3 year crop rotations to lower populations of this invasive nematode.

show abstract

Yellow and purple nutsedge and coffee senna as hosts of common plant nematodes in Florida

Cited by 2 publications

References 11 publications

Evaluation of Weed Species for Host Status to the Root-Knot Nematodes Meloidogyne enterolobii and M. incognita Race 4

Evaluation of Weed Species for Host Status to the Root-Knot Nematodes Meloidogyne enterolobii and M. incognita Race 4

Occurrence and Distribution of Meloidogyne spp. in Fields Rotated with Sweetpotato and Host Range of a North Carolina Population of Meloidogyne enterolobii

Contact Info

Product

Resources

About