Penetration, development, and reproduction of Heterodera schactii on Fagopyrum esculentum, Phacelia tanacetifolia, Raphanus sativus, Sinapis alba, and Brassica oleracea

The penetration, development, and reproduction of a California population of the sugarbeet cyst nematode, Heterodera schachtii, was observed on cultivars of cabbage (Brassica oleracea), phacelia (Phacelia tanacetifolia), buckwheat (Fagopyrum esculentum), oilseed radish (Raphanus sativus), and white...

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Bibliographic Details
Published in:Journal of nematology 1993, Vol.25 (4), p.695-702
Main Authors: Gardner, J, Caswell-Chen, E.P
Format: Article
Language:English
Subjects:
biological development
Brassica oleracea
Fagopyrum esculentum
Heterodera schachtii
penetration
Phacelia tanacetifolia
Raphanus sativus
reproduction
Sinapis alba
trap crops
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Summary:The penetration, development, and reproduction of a California population of the sugarbeet cyst nematode, Heterodera schachtii, was observed on cultivars of cabbage (Brassica oleracea), phacelia (Phacelia tanacetifolia), buckwheat (Fagopyrum esculentum), oilseed radish (Raphanus sativus), and white mustard (Sinapis alba). With the exception of the nonhost, phacelia, all were readily penetrated by second-stage juveniles of H. schachtii. After 38 days at 25 C, no cysts were observed on phacelia cv. Angelia or on the oilseed radish cv. Nemex and Pegletta. Cyst production was low (< 2.5 cysts/plant) on the buckwheat cv. Tardo and Prego and most of the oilseed radish cultivars. Cyst production was intermediate (5-14 cysts/plant) on most of the white mustard cultivars, and high on cabbage (20-110 cysts/plant). In microplot studies conducted over 133 days (approx. 450 degree-days, base 8 C), the reproductive index for H. schachtii was greater than 1.0 for cultivars of phacelia, oilseed radish, and white mustard as well as in fallow treatments, indicating the need for further research on the use of these crops under field conditions.
ISSN:0022-300X
2640-396X