Population dynamics of Heterodera avenae Woll. in South Australia

Fisher, J.M.; Hancock, TW

doi:10.1071/ar9910053

Cited by 17 publications

(6 citation statements)

References 24 publications

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“…The lack of increased total hatch due to root diffusates is similar to the results obtained by Fisher and Hancock (1991), who did not find an increase of total hatch of H. avenae in root diffusates. Williams and Beane (1979) found a slight increase in hatch of H. avenae from England in response to root diffusate in experiments lasting for 35 weeks.…”

Section: Discussionsupporting

confidence: 91%

Hatching behaviour and life cycle of Heterodera latipons Franklin under Syrian agro-ecological conditions

Scholz¹,

Sikora²

2004

Nematol

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The cereal cyst nematode Heterodera latipons Franklin is widespread in the eastern Mediterranean area and often occurs in mixed populations with H. avenae in cereal cropping systems. Differences between the two species in hatching behaviour and development cycle may be factors responsible for the low level of detection of H. latipons in the region. The aim of this study was to investigate the influence of different temperature regimes, agro-ecosystem, sampling date, cyst age and barley root diffusate on the hatching behaviour of H. latipons and its life cycle. The investigations were conducted by observing hatch and development under both field and glasshouse conditions. The optimum temperature for hatching was 10 • C. The hatched second-stage juveniles of H. latipons from the dry and wet agro-ecological zones are found in the soil from December to April with peak densities in January and February. Thirty to 45% of the eggs of both populations from the dry and wet zone hatch slowly over the growing season. The results of hatching tests, simulating pre-planting soil temperatures in Syria, indicate that treatment for 16 days at 5 • C initiates the hatching cycle of H. latipons. There was no significant difference in total hatch when cysts were placed in tap water or in barley root diffusates.

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Section: Discussionsupporting

confidence: 91%

Hatching behaviour and life cycle of Heterodera latipons Franklin under Syrian agro-ecological conditions

Scholz¹,

Sikora²

2004

Nematol

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“…The reduction in grain yield increased with both increasing P i and P f . Meagher and Brown (1974), Fisher and Hancock (1991), Ibrahim et al (1999), Al-Hazmi et al (1999) and Smiley et al (2005a) reported similar results with H. avenae. In a similar experiment conducted by Fisher and Hancock (1990) a density of 5 egg (g soil) −1 or fewer of H. avenae caused a significant loss of about 10% in yield of wheat.…”

Section: Discussionsupporting

confidence: 81%

Effect of the cereal cyst nematode, Heterodera filipjevi, on wheat in microplot trials

Hajihasani

Maafi

Nıcol

et al. 2010

Nematol

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The cereal cyst nematodes, Heterodera avenae, H. filipjevi and H. latipons, are considered to be the most economically important species of cyst-forming nematodes on wheat. Two trials were conducted in 2006 and 2007 to determine the impact of different initial population levels of H. filipjevi (0, 2.5, 5, 10 and 20 eggs and second-stage juveniles (J2) (g soil) −1 ) on wheat cv. Sardari in microplots under natural field conditions in Iran. The results showed that increasing the initial populations of H. filipjevi significantly reduced several growth parameters of wheat (plant height, root dry weight, aerial shoot dry weight and grain yield) compared with the untreated controls. The final population of H. filipjevi increased with increasing initial population, while the reproduction factor (R f ) declined as the initial population increased but was greater than 1 in all treatments. Regression analysis showed a significant negative relationship between the initial populations and grain yield. The modelling clearly demonstrated that H. filipjevi is economically important on winter wheat in Iran. Grain yield loss was demonstrated even at the lowest population density and reached a maximum loss of 48% with an initial population density of 20 eggs and J2 (g soil) −1 . The aerial shoot yield loss was as great as 40% in both years.

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“…Storey (1982) continued the detailed seasonal investigation of the development of G. rostochiensis and found that population changes occurred initially close to the planting depth of the potato tuber, the timing and scale at the other depths being correlated with the cysts position relative to that of the planted tuber. However, in other parts of the world the influence of the nematophagous fungi were shown tobe less than in Northern Europe and the population dynamics of H. avenae considerably different (Fisher and Hancock, 1991). The monitoring, during the different seasons of the year, of the cereal cyst nematode by Lopez-Llorca (1988) has lead to a better understanding of the infection process of the nematophagous fungi which Kerry (1974; had shown could naturally keep cereal cyst nematode populations below economic threshold levels in the British Isles.…”

Section: Surveillancementioning

confidence: 95%

The Cyst Nematodes

Sharma¹

1998

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Population dynamics of Heterodera avenae Woll. in South Australia

Cited by 17 publications

References 24 publications

Hatching behaviour and life cycle of Heterodera latipons Franklin under Syrian agro-ecological conditions

Hatching behaviour and life cycle of Heterodera latipons Franklin under Syrian agro-ecological conditions

Effect of the cereal cyst nematode, Heterodera filipjevi, on wheat in microplot trials

The Cyst Nematodes

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