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Session 2. Paper 1. Distribution of cereal cyst nematodes (Heterodera spp.) and root lesion nematodes (Pratylenchus spp.) in wheat fields in Tadla region of Morocco

By: Jadouali, S.M.
Contributor(s): Ibourki, M | Sbaghi, M | Dababat, A.A | Janati, S | Mokrini, F.
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Agadir, Morocco : INRA : CIMMYT : MFAL, 2017Subject(s): Heterodera AGROVOC | Pratylenchus AGROVOC | Nematoda | Morocco AGROVOCOnline resources: Access only for CIMMYT Staff In: Proceedings of the Sixth International Cereal Nematodes Symposium p. 12Summary: The distribution of cereal cyst nematodes (CCN) and root lesion nematodes (RLN) in the Tadla region of Morocco was investigated by systematic surveys of cereal fields conducted in March 2017. Cysts were extracted from soil using flotation and decanting through 200μm sieves. Vermiform stages were extracted from soil using Baermann funnel method. Nematodes were identified up to species level using the morphological method. Cereal cyst nematodes were found only in 10% of soil samples and root lesion nematodes in 80% of soil samples. Cereal cyst nematodes were identified as Heterodera avenae. Population densities of CCN in soil samples were 2 cysts/200 g soil, possibly less than the critical threshold for damage. The root lesion nematodes, Pratylenchus thornei and P. penetrans were the most widely distributed species of root lesion nematode in the surveyed area. Densities of mobile stages of RLN in wheat fields ranged from 15 to 35/100 g of soil.
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Book part CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

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The distribution of cereal cyst nematodes (CCN) and root lesion nematodes (RLN) in the Tadla region of Morocco was investigated by systematic surveys of cereal fields conducted in March 2017. Cysts were extracted from soil using flotation and decanting through 200μm sieves. Vermiform stages were extracted from soil using Baermann funnel method. Nematodes were identified up to species level using the morphological method. Cereal cyst nematodes were found only in 10% of soil samples and root lesion nematodes in 80% of soil samples. Cereal cyst nematodes were identified as Heterodera avenae. Population densities of CCN in soil samples were 2 cysts/200 g soil, possibly less than the critical threshold for damage. The root lesion nematodes, Pratylenchus thornei and P. penetrans were the most widely distributed species of root lesion nematode in the surveyed area. Densities of mobile stages of RLN in wheat fields ranged from 15 to 35/100 g of soil.

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