scholarly journals Occurrence and Development of the Cereal Cyst Nematode (Heterodera avenae) in Shandong, China

Plant Disease ◽  
2014 ◽  
Vol 98 (12) ◽  
pp. 1654-1660 ◽  
Author(s):  
Hai Yan Wu ◽  
Qiong He ◽  
Jing Liu ◽  
Jian Luo ◽  
De Liang Peng
Keyword(s):  
Population Dynamics ◽  
Winter Wheat ◽  
Stem Elongation ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Life Stages ◽  
Population Densities ◽  
Wheat Roots ◽  
Booting Stage

The cereal cyst nematode (CCN), Heterodera aveane, has been found in 16 provinces of China, including the Shandong winter-wheat-growing region. This study investigated the population dynamics of H. avenae in the winter wheat ‘Jimai 22’ and ‘Tainong 18’ for two consecutive years in the field. Soil and root samples were collected during the winter-wheat-growing season and H. avenae population densities and life-stages determined. H. avenae population dynamics in roots and soil of the two winter wheat cultivars were similar over the 2-year period. Second-stage juvenile (J2) population densities in wheat roots were greatest during booting stage (April), when mean soil temperature was between 11.8 and 14.4°C. Cysts in rhizosphere soil increased significantly when new cysts were formed after Zadoks (Z) 47 (booting stage). There was a peak in J2 population densities in soil during Z23 and Z30 (tillering and stem elongation, respectively) whereas J2 population densities were the lowest at Z13 (seedling stage). This research provides important information indicating that J2 populations in roots and soil increased after the wheat winter dormancy period. Knowledge of when different life stages of H. avenae occur in winter wheat in Shandong will provide valuable insights to enable the development of an integrated approach to manage this plant-parasitic nematode.

scholarly journals Effect of Foliarly Applied Spirotetramat on Reproduction of Heterodera avenae on Wheat Roots

Plant Disease ◽  
2011 ◽  
Vol 95 (8) ◽  
pp. 983-989 ◽  
Author(s):  
R. W. Smiley ◽  
J. M. Marshall ◽  
G. P. Yan
Keyword(s):  
Pacific Northwest ◽  
Cyst Nematode ◽  
Crop Rotations ◽  
Cereal Crops ◽  
Heterodera Avenae ◽  
Single Application ◽  
Population Densities ◽  
Nematode Density ◽  
Wheat Roots ◽  
The Pacific

The cereal cyst nematode, Heterodera avenae, has the potential to reduce yields of cereal crops in the Pacific Northwest. Spirotetramat (Movento) is a foliar-applied insecticide with ambimobile translocation that reduces fecundity of sucking insects which feed on roots as well as foliage. Spirotetramat (88 g/ha) was applied to foliage during 2010 in two wheat fields infested by H. avenae near St. Anthony, ID and Palouse, WA. In Idaho, two applications at 2-week intervals during late spring to plants already exhibiting swollen white females reduced the postharvest density of H. avenae eggs plus juveniles by 35% (P = 0.03) compared to the nontreated control. In Washington, a single application before white females became apparent reduced the nematode density by 78% (P = 0.01). Grain yields and test weights were not significantly affected by application of spirotetramat at either location. In addition, symptomatic plants from the Idaho field were transplanted into greenhouse pots and treated with spirotetramat. One application (110 g/ha) reduced numbers of eggs plus juveniles/plant by 78% (P = 0.02). Spirotetramat effectively reduced H. avenae populations and warrants further evaluation as a substitute for crop rotations or long fallow periods that reduce nematode population densities in infested fields.

scholarly journals Incidence of Cereal Cyst Nematode Prevailing in Wheat-rice Growing Regions of Punjab Province, Pakistan

2020 ◽  
Author(s):  
M. Imran Hamid ◽  
M. Usman Ghazanfar ◽  
M. Qaiser Naeem Khan ◽  
Zaib ul Hasan ◽  
Saman Aslam
Keyword(s):  
Nematode Species ◽  
Cyst Nematode ◽  
Soil Samples ◽  
Rice Fields ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Cyst Nematodes ◽  
Population Densities ◽  
Punjab Province ◽  
Rice Monoculture

Background: Cereal Cyst Nematodes (CCN) are prevailing in all type of agricultural lands and responsible for enormous losses of cereal crops. The understandings on population densities and management of these nematode are required to improve crop health and productivity.Methods: A study was designed to assess the incidence of cereal cyst nematodes in wheat and rice monoculture cropping regions of eight districts of Punjab province, viz., Jhang, Khushab, layyah, Hafizabad, Sheikhupura, Narowal, Gujranwala and Sargodha in Pakistan. Population densities of cereal cyst nematodes were studied by extracting the cysts and second stage juveniles from soil samples and identified the nematode species. Result: The CCNs were found in 80% of the total 250 samples collected from wheat and rice monoculture fields of at least one crop. In the soil samples collected from wheat fields, an average of 7 to 38 cysts/100g of dry soil with eggs and J2 population of 142-771 were recorded. Whereas from the soil samples of rice fields, 17 to 25 cysts/100g soil were found with 345 to 508 eggs and juveniles. Among the wheat fields, the lowest incidence of 5.5% was recorded in kot–momin and highest incidence of 16.88% was recorded in Silanwali tehsils of Sargodha region. In rice fields, 24.69 to 27.00% incidence of CCNs was noticed in soil samples of various surveyed regions. Three different species of Heterodera genus were morphologically identified from the collections. The species includes Heterodera oryzae, Heterodera avenae and Heterodera graminophila. H. oryzae was more abundant in rice growing regions while H. avenae and H. graminophila were present dominantly in wheat growing regions. This study provides an inclusive information regarding cereal cyst nematode densities and species in wheat-rice growing regions of Punjab province of Pakistan.

The relation between wheat yield and early damage of roots by cereal cyst nematode

1982 ◽  
Vol 22 (116) ◽  
pp. 201 ◽  
Author(s):  
A Simon ◽  
AD Rovira
Keyword(s):  
Grain Yield ◽  
Wheat Yield ◽  
Chemical Properties ◽  
Dry Weight ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Wheat Roots ◽  
Seminal Roots ◽  
Physical And Chemical

A survey of 14 farmers' fields in the Northern Adelaide Plains in 1978 showed that cereal cyst nematode (Heterodera avenae Woll.) was the major factor limiting wheat yields, with a relation of r = -0.86 (P < 0.001) between damage to wheat roots at the seedling stage and grain yield. None of the 12 physical and chemical properties of the soils measured was related to cereal cyst nematode damage or grain yield. Samples taken from experimental plots with similar soil and climate showed a build up of H. avenae after four successive wheat crops and highly significant negative correlations between the damage to seminal roots by H. avenae, dry weight at flowering, and grain yield. A highly significant positive correlation of 0.84 existed between the damage to the seminal roots and the number of females (white cysts) on the roots at flowering.

scholarly journals Characterization of Resistance to the Cereal Cyst Nematode in the Soft White Winter Wheat ‘Madsen’

Plant Disease ◽  
2016 ◽  
Vol 100 (4) ◽  
pp. 679-685 ◽  
Author(s):  
Longfei Wu ◽  
Lei Cui ◽  
Honglian Li ◽  
Lei Sun ◽  
Xiu Gao ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Negative Impact ◽  
Wide Spectrum ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Specific Marker ◽  
Aegilops Ventricosa ◽  
Significant Negative Impact ◽  
Different Populations

The cereal cyst nematode (CCN) has a significant negative impact on production of wheat in China. The presence of pathotypes of both Heterodera avenae and H. filipjevi makes it necessary to identify genetic resources with a wide spectrum of resistance. Results of this study confirmed that the soft white winter wheat ‘Madsen’ was resistant to many different populations of both H. filipjevi and H. avenae in both naturally infested fields and artificial inoculation tests in China. Fewer juvenile nematodes penetrated roots of Madsen than susceptible ‘Wenmai 19’ in the early stages of the interaction between the nematodes and plant. Testing wheat cultivars in the pedigree of Madsen demonstrated that the CCN resistance of Madsen was inherited from ‘VPM1’ via the line ‘VPM1/Moisson 951’. Presence of a 2NS chromosome segment from Aegilops ventricosa was detected in Madsen using a Vrga1D-specific marker. However, it appears that gene Pm4b for resistance to powdery mildew (caused by Blumeria graminis f. sp. tritici) was not transferred from VPM1 into Madsen because these cultivars had different reaction patterns against 20 B. graminis f. sp. tritici isolates from China. Madsen serves as an effective source of host resistance from damage caused by CCN.

Genetic variation and population dynamics of the cereal cyst nematode, Heterodera filipjevi in wheat areas of Bolu, Turkey

2017 ◽  
Vol 42 (5) ◽  
pp. 362-369 ◽  
Author(s):  
Mustafa Imren ◽  
Lieven Waeyenberge ◽  
A. Sami Koca ◽  
Nagihan Duman ◽  
Şenol Yildiz ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Genetic Variation ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Filipjevi
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