HETERODERA AVENAE PDF

The ecology and control of cereal cyst nematode in southern Australia is reviewed. The wide distribution of Heterodera avenae in Victoria and South Australia is. A key based on cyst and juvenile characters is given for identification of 12 valid Heterodera species in the H. avenae group. A compendium providing the most. World distribution of the cereal-cyst nematode is herein reviewed. It is suggested that Heterodera avenae originated in Europe and has been widely.

Author: Brarg Kajishicage
Country: Mauritania
Language: English (Spanish)
Genre: Love
Published (Last): 19 August 2018
Pages: 84
PDF File Size: 10.57 Mb
ePub File Size: 15.33 Mb
ISBN: 194-1-18412-289-8
Downloads: 94510
Price: Free* [*Free Regsitration Required]
Uploader: Moogushicage

Cereal heads produced by stunted plants are usually small and poorly filled; for details see Williams and Siddiqi and Wilski The presence of the disease can be established by inspecting the root system of plants and looking for abnormal development.

Copyright and License information Disclaimer.

Excretory pore near esophago-intestinal junction. Subcrystalline layer consipcuous, sloughing off as the dark brown cyst is formed. This method may not be attractive when cereals are grown exclusively for export as in Australia.

Heterodera avenae – Wikipedia

This article has been cited by other articles in PMC. First- and second-stage juveniles folded 4 times within the egg.

  EXTRON MPS 409 PDF

Introduction The host range of H. Average cyst size 0. Thresholds of harmfulness depend on the population density of the nematode and differ among various cultivars and varieties. Esophageal glands ventral and ventro-lateral to intestine; dorsal with larger nucleus located closely behind esophago-intestinal junction, subventrals extending past the dorsal.

Oats Oat leaves become red. Lateral field s with 4 incisures, outer bands usually areolated. Cyst characters are most useful for separating species; these include shape, color, cyst wall pattern, fenestration, vulval slit length, and the posterior cone including presence or absence of bullae and underbridge.

Integrated Taxonomic Information System. Causes yellowing of plants; much branching and some swelling of roots may occur, particularly in oats and wheat. Rotation with crucifers is also effective.

Tail end usually twisted. Journal List J Nematol v. Seminal roots are usually most affected.

There was a problem providing the content you requested

Mean of 20 eggs from neotype locality Aschersleben, Germany: Schmidt, Heterodera ustinovi Kirjanova, [1] Heterodera schachtii var. Median esophageal bulb rounded, with a distinct valve.

Esophageal glands as described for the male, not filling the body cavity. Mobile, second-stage juveniles leave agenae cysts in Feb. The resowing of damaged wheat crops or the application of nitrogenous fertilizers rarely improve grain yields.

  HENRY NEFF THE MAELSTROM PDF

A Key and Compendium to Species of the Heterodera avenae Group (Nematoda: Heteroderidae)

Please review our privacy policy. Hemizonion indistinct, 6 to 7 annules behind excretory pore. In autumn-sown wheat in Australia, damage is most severe following early start of the rainy season, attributed to increased juvenile emergence and mobility Meagher, These then develop into either females or males and mating takes place.

Cookies on Plantwise Knowledge Bank Like most websites we use cookies. For plants reported to have some level of resistance to this species, click. Hence crop rotation, using non-host crops and control of grassy weeds, provides good control.

Fallowing checks population build-up by starvation of emerged juveniles; however, this method is unattractive ueterodera of reduction of the heteroderx period available to farmers and the need for thorough weed control.