scholarly journals Double-Cropping Cucumbers and Squash After Resistant Bell Pepper for Root-Knot Nematode Management

Plant Disease ◽  
2004 ◽  
Vol 88 (6) ◽  
pp. 589-593 ◽  
Author(s):  
Judy A. Thies ◽  
Richard F. Davis ◽  
John D. Mueller ◽  
Richard L. Fery ◽  
David B. Langston ◽  
...  
Keyword(s):  
Cucumis Sativus ◽  
Meloidogyne Incognita ◽  
Cucurbita Pepo ◽  
Cropping Systems ◽  
Bell Pepper ◽  
Recurrent Parent ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Double Cropping ◽  
Southern Root Knot Nematode

‘Charleston Belle’, a root-knot nematode-resistant pepper (Capsicum annuum var. annuum [Grossum Group]), and its susceptible recurrent parent, ‘Keystone Resistant Giant’, were compared as spring crops for managing the southern root-knot nematode (Meloidogyne incognita) in fall-cropped cucumber (Cucumis sativus) and squash (Cucurbita pepo) at Blackville, SC and Tifton, GA. ‘Charleston Belle’ exhibited minimal root galling and nematode reproduction, and ‘Keystone Resistant Giant’ exhibited severe root galling and high nematode reproduction. Cucumber grown in plots following ‘Charleston Belle’ had lower (P ≤ 0.001) root gall severity indices than following ‘Keystone Resistant Giant’ (4.2 versus 4.9, respectively). Cucumber yields were 87% heavier (P ≤ 0.0001) and numbers of fruit were 85% higher (P ≤ 0.0001) in plots previously planted to ‘Charleston Belle’ than to ‘Keystone Resistant Giant’. Squash grown in plots following ‘Charleston Belle’ had lower (P ≤ 0.001) root gall severity indices than following ‘Keystone Resistant Giant’ (4.0 versus 4.8, respectively). Squash yields were 55% heavier (P ≤ 0.01) and numbers of fruit were 50% higher (P ≤ 0.001) in plots previously planted to ‘Charleston Belle’ than to ‘Keystone Resistant Giant’. These results demonstrate that root-knot nematode-resistant bell pepper cultivars such as ‘Charleston Belle’ are useful tools for managing M. incognita in double-cropping systems with cucurbit crops.

scholarly journals Host Resistance and Metam Sodium for Managing Root-knot Nematodes in a Pepper–Cucumber Rotation

HortScience ◽  
2005 ◽  
Vol 40 (7) ◽  
pp. 2080-2082 ◽  
Author(s):  
Judy A. Thies ◽  
Richard F. Davis ◽  
John D. Mueller ◽  
Richard L. Fery ◽  
David B. Langston ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Bell Pepper ◽  
Recurrent Parent ◽  
Drip Irrigation System ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Metam Sodium ◽  
Southern Root Knot Nematode ◽  
Treatment Application

Root-knot nematode-resistant `Charleston Belle' bell pepper (Capsicum annuum L. var. annuum) and metam sodium treatment were evaluated for managing the southern root-knot nematode [Meloidogyne incognita (Chitwood) Kofoid and White] in fall-cropped cucumber (Cucumis sativus L.). `Charleston Belle' and its susceptible recurrent parent, `Keystone Resistant Giant', were planted as spring crops at Blackville, S.C., and Tifton, Ga. `Charleston Belle' exhibited high resistance and `Keystone Resistant Giant' was susceptible at both locations. After termination of the bell pepper crop, one-half of the plots were treated with metam sodium delivered through the drip irrigation system. Cucumber yields and numbers of fruit were highest for cucumber grown in plots treated with metam sodium following either `Charleston Belle' or `Keystone Resistant Giant'; however, root gall severity and numbers of M. incognita eggs in the roots were lowest for cucumber grown in plots treated with metam sodium following `Charleston Belle'. Conversely, root gall severity and nematode reproduction were highest for cucumber grown in plots following `Keystone Resistant Giant' without metam sodium treatment. Application of metam sodium through the drip irrigation system following a spring crop of root-knot nematode-resistant bell pepper should reduce severity of root galling and reproduction of M. incognita as well as increase fruit yield of fall-cropped cucumber.

scholarly journals Stability of Resistance to Root-knot Nematodes in ‘Charleston Belle’ and ‘Carolina Wonder’ Bell Peppers in a Sub-tropical Environment

HortScience ◽  
2008 ◽  
Vol 43 (1) ◽  
pp. 188-190 ◽  
Author(s):  
Judy A. Thies ◽  
Don W. Dickson ◽  
Richard L. Fery
Keyword(s):  
Methyl Bromide ◽  
Meloidogyne Incognita ◽  
Bell Pepper ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Tropical Environments ◽  
Bell Peppers ◽  
Stability Of Resistance ◽  
Soil Temperatures ◽  
Southern Root Knot Nematode

Two root-knot nematode-resistant bell pepper cultivars, ‘Charleston Belle’ and ‘Carolina Wonder’ (Capsicum annuum L. var. annuum], and their susceptible parents, ‘Keystone Resistant Giant’ and ‘Yolo Wonder B’, were compared for managing the southern root-knot nematode [Meloidogyne incognita (Chitwood) Kofoid and White] in fall and spring tests at Citra, FL. In the fall test, ‘Charleston Belle’ and ‘Carolina Wonder’ exhibited minimal root galling and nematode reproduction, and ‘Keystone Resistant Giant’ and ‘Yolo Wonder B’ exhibited severe root galling and high nematode reproduction. Fruit yield of ‘Charleston Belle’ was 97% greater than yields of the two susceptible cultivars (P ≤ 0.006). In the spring test, one-half of the plots were treated with methyl bromide/chloropicrin before planting the same four bell pepper cultivars. ‘Keystone Resistant Giant’ and ‘Yolo Wonder B’ grown in untreated control plots exhibited severe root galling and high nematode reproduction, but the other six cultivar × methyl bromide combinations exhibited minimal root galling and nematode reproduction. Although soil temperatures (10-cm depth) were greater than 30 °C on 78 days and 57 days during the Fall 2002 and Spring 2003 trials, respectively, resistance did not break in ‘Charleston Belle’ and ‘Carolina Wonder’ in either test. These results demonstrate that root-knot nematode-resistant cultivars such as Charleston Belle and Carolina Wonder are viable alternatives to methyl bromide for managing southern root-knot nematode in bell pepper in sub-tropical environments.

scholarly journals Controlling the southern root-knot nematode (Meloidogyne incognita Chitwood) with grafted and resistant pepper varieties

2010 ◽  
Vol 16 (2) ◽  
Author(s):  
Z. Mándoki
Keyword(s):  
Meloidogyne Incognita ◽  
Control Method ◽  
Environmentally Friendly ◽  
Bell Pepper ◽  
N Gene ◽  
Root Knot Nematode ◽  
Resistant Varieties ◽  
Environmentally Safe ◽  
Resistant Rootstock ◽  
Southern Root Knot Nematode

Newly bred resistant bell pepper varieties and those grafted onto resistant rootstock s were tested in soil severely infested with southern root-knot nematode [Meloidogy11e incognita (Kofoid and White) Chitwood] in unheated plastic house and compared to varieties on their own roots, in order to evaluate the efficiency of this environmentally friendly control method. 'Cinema F I ' carrying the N gene yielded significantly more than the two susceptible varieties. Varieties grafted onto resistant rootstocks outyielded those on their own roots although to different extent, which was not always significant. At the end of the vegetat ion period the roots of the rootstocks were undamaged and the roots of some resistant varieties were slightly infected. whereas the roots of susceptible varieties were severely damaged. According to our result  . both the use of resistant varieties and grafted plants offer an effective and environmentally safe way of controlling M. incognita.

Resistance to Meloidogyne arenaria in Advanced Generation Breeding Lines of Peanut1

1995 ◽  
Vol 22 (1) ◽  
pp. 59-61 ◽  
Author(s):  
J. L. Starr ◽  
C. E. Simpson ◽  
T. A. Lee
Keyword(s):  
Field Tests ◽  
Recurrent Parent ◽  
Meloidogyne Arenaria ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Breeding Lines ◽  
Nematode Population Density ◽  
Arachis Batizocoi ◽  
Moderate Resistance ◽  
Moderately Resistant

Abstract Levels of resistance to the root-knot nematode Meloidogyne arenaria in F2 individuals from the second, third, and fourth backcross (BC) generations were compared in seven separate tests to that of the root-knot nematode-resistant peanut germplasm line TxAG-7. Resistance of TxAG-7 was derived from the wild species Arachis batizocoi, A. cardenasii, and A. diogoi. Recurrent susceptible parents were Florunner and Tamnut 74 for the all backcrosses, Tamspan 90 for BC3 and BC4, and NC 7 and VC-1 for BC4. Resistance in these tests was defined as an inhibition of nematode reproduction relative to that of the susceptible recurrent parent. Numerous individuals with a level of resistance similar to that of TxAG-7 were identified from each backcross generation. In three field tests, the resistant BC2 genotype TP-223 supported a lower final nematode population density than did its susceptible recurrent parent Florunner. When rooted cuttings from selected BC4F2 individuals were retested to confirm the original resistance class, ratings were unchanged for those originally identified as resistant or susceptible. Of nine individuals originally identified as having moderate resistance (2.5 to 12.5% of the eggs/g roots as the susceptible recurrent parent), one was identified as susceptible, one as moderately resistant, and seven as resistant (<2.5% of the eggs/g roots) upon retest. These data are evidence that this source of resistance is readily recoverable from advanced back-cross generations.

Assessment of the most suitable nematode inoculum density and plant growth period to screen coffee genotypes for their reaction to Meloidogyne incognita

Nematology ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 373-380
Author(s):  
Santino A. Silva ◽  
Anderson C.G. Bicalho ◽  
Débora C. Santiago ◽  
Lucas S. Cunha ◽  
Andressa C.Z. Machado
Keyword(s):  
Meloidogyne Incognita ◽  
Genetic Screening ◽  
Coffea Arabica ◽  
Growth Period ◽  
Root Knot Nematode ◽  
Population Densities ◽  
Nematode Reproduction ◽  
Rf Values ◽  
Reproduction Factor ◽  
The Ideal

Summary One of the concerns for nematological research is the absence of information on standard nematode population densities to be used when screening to assess resistance/susceptibility levels of a genotype. In addition, the length of the growth period, especially for perennial crops such as coffee, must also be known. The objective of this work was to evaluate the ideal evaluation periods and population densities of the root-knot nematode, Meloidogyne incognita, for phenotyping Coffea arabica genotypes. Seedlings of coffee ‘Mundo Novo’ with five leaf pairs cropped in 700 cm3 plastic pots were inoculated with population densities of 700, 1400, 2800, 5600 and 11 200 eggs of M. incognita per plant and evaluated at 90, 120, 150 and 180 days after inoculation (DAI) to determine the nematode reproduction factor (RF). The use of population densities of M. incognita from 700-2000 nematodes with evaluations between 90 and 180 DAI was the most suitable to obtain higher RF values and allows earlier and more accurate evaluations, which reduces the time for phenotyping in genetic screening programmes.

scholarly journals Effect of Glomus Mosseae (Arbuscular Mycorrhizal Fungus) On Host - Parasite Relationship of Meloidogyne Incognita (Southern Root-Knot Nematode) on Four Improved Cowpea Varieties

2010 ◽  
Vol 50 (3) ◽  
pp. 321-325 ◽  
Author(s):  
Ishola Odeyemi ◽  
Steve Afolami ◽  
Olufemi Sosanya
Keyword(s):  
Meloidogyne Incognita ◽  
Glomus Mosseae ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Root Knot Nematode ◽  
Parasite Relationship ◽  
Cowpea Varieties ◽  
Host Parasite ◽  
Southern Root Knot Nematode ◽  
Relationship Of

Effect of Glomus Mosseae (Arbuscular Mycorrhizal Fungus) On Host - Parasite Relationship of Meloidogyne Incognita (Southern Root-Knot Nematode) on Four Improved Cowpea VarietiesTwo pot experiments and a field study were conducted in a Randomized Complete Block Design (RCBD). The experiments were conducted to determine the effect ofGlomus mosseae, a mycorrhiza fungus, on the reaction of four improved cowpea varieties toMeloidogyne incognita.Cowpea plants were inoculated with a single or a combination of 5 000 eggs ofM. incognitaand 50 g ofG. mosseaeinoculum containing 5 spores/g of soil. The standardized method of screening and reporting resistance of crop germplasm to root-knot nematodes at 60 days after planting, and the modified version of including yield for resistance rating at harvest were used for this study. Root galling due toM. incognitainfection was significantly lower on all the cowpea varieties treated withG. mosseaeand more significantly on IT90K-277-2 and IT89KD-288 in the screenhouse.G. mosseae, suppressed root-knot nematode reproduction on all the varieties compared to cowpea plants infected only byM. incognitaboth in the screenhouse and field experiments. Also,G. mosseaemitigated the damage attributable to the root-knot nematode on all these varieties. Using Gall Index (GI), reproduction factor and yield,G. mosseaewas effective in improving the resistance of the cowpea varieties toM. incognita.IT90K-76 cowpea variety was consistently resistant to the root-knot nematode, while IT90K-277-2 was tolerant withM. incognitainfection but resistant withG. mosseaetreatment. IT90K-941-1 variety was resistant in the screenhouse. The results of this study also confirmedG. mosseaeas a potential bio-control agent forM. incognitaon these cowpea varieties.

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