Dominant and additive resistance to the root-knot nematodes Meloidogyne chitwoodi and M. fallax in Central American Solanum species

1997 ◽  
Vol 94 (5) ◽  
pp. 692-700 ◽  
Author(s):  
G. J. W. Janssen ◽  
A. v. Norel ◽  
R. Janssen ◽  
J. Hoogendoorn
Keyword(s):  
Solanum Species ◽  
Central American ◽  
Meloidogyne Chitwoodi ◽  
Root Knot Nematodes ◽  
Additive Resistance

Introgression of resistance to root-knot nematodes from wild Central American Solanum species into S. tuberosum ssp. tuberosum

1997 ◽  
Vol 95 (3) ◽  
pp. 490-496 ◽  
Author(s):  
G. J. W. Janssen ◽  
A. van Norel ◽  
B. Verkerk-Bakker ◽  
R. Janssen ◽  
J. Hoogendoorn
Keyword(s):  
Solanum Species ◽  
Central American ◽  
Root Knot Nematodes

Population fluctuations of root-knot nematodes Meloidogyne chitwoodi and M. hapla under field conditions

2021 ◽  
Author(s):  
Emre Evlice ◽  
Halil Toktay ◽  
Gökhan Yatkın ◽  
Fatma Dolunay Erdoğuş ◽  
Mustafa İmren
Keyword(s):  
Field Conditions ◽  
Population Fluctuations ◽  
Meloidogyne Chitwoodi ◽  
Root Knot Nematodes

The MeloTuber Test: a real-time TaqMan® PCR-based assay to detect the root-knot nematodes Meloidogyne chitwoodi and M. fallax directly in potato tubers

EPPO Bulletin ◽  
2014 ◽  
Vol 44 (2) ◽  
pp. 166-175 ◽  
Author(s):  
E. G. de Haan ◽  
C. C. E. M. Dekker ◽  
W. I. L. Tameling ◽  
L. J. M. F. den Nijs ◽  
G. W. van den Bovenkamp ◽  
...  
Keyword(s):  
Real Time ◽  
Potato Tubers ◽  
Meloidogyne Chitwoodi ◽  
Root Knot Nematodes

The influence of root diffusate and host age on hatching of the root-knot nematodes, Meloidogyne chitwoodi and M. fallax

Nematology ◽  
2006 ◽  
Vol 8 (6) ◽  
pp. 895-902 ◽  
Author(s):  
Wim Wesemael ◽  
Roland Perry ◽  
Maurice Moens
Keyword(s):  
Growing Season ◽  
Survival Strategies ◽  
Egg Mass ◽  
Host Age ◽  
Meloidogyne Chitwoodi ◽  
Root Knot Nematodes ◽  
Egg Masses ◽  
Second Stage ◽  
Host Root

AbstractThe root-knot nematodes, Meloidogyne chitwoodi and M. fallax, cause severe damage to economically important crops and, in 1998, both species were listed as quarantine pests in Europe. Comparative studies were made on the effects of root diffusates and host age on the in vitro hatching of M. chitwoodi and M. fallax. There is a marked contrast in the hatching response of the two species. Hatching of second-stage juveniles (J2) of M. chitwoodi produced on young plants did not require host root diffusate stimulus, whereas at the end of the plant growing season, egg masses contained a percentage of unhatched J2 that require host root diffusate to cause hatch. This form of obligate quiescence at the end of the host growing season was not found in M. fallax. This species hatched well in water and did not require hatch stimulation from root diffusate, irrespective of the age of the plant on which the egg masses were produced. The number of eggs per egg mass for M. fallax collected on senescing plants was significantly greater than the number of eggs per egg mass for M. chitwoodi. The number of eggs per egg mass of M. chitwoodi decreased with plant age. The results are discussed in the context of the differing survival strategies of the two species.

Occurrence and biogeographic significance of Heliaster (Echinodermata: Asteroidea) from the Pliocene of southwest Florida

1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell
Keyword(s):  
Central American ◽  
Eastern Pacific ◽  
Whole Body ◽  
Marine Fauna ◽  
Western Atlantic ◽  
Southwest Florida ◽  
Extant Species ◽  
Geologic Record ◽  
Central American Isthmus

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.

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