Spring invasion of Heterodera schachtii in sugarbeet; a simulation study
نویسندگان
چکیده
منابع مشابه
Invasion of Sugarbeet Leaf Blades by Larvae of Heterodera schachtii.
Although Polychronopolis and Lownsbery (1) found that Heterodera schachtii invaded the radicle, hypocotyl, and cotyledons of seedling sugarbeet, they observed no histological or cytological changes other than cellular death and disorganization. Ross (2) reported development of females and brown cysts accompanied by formation of giant cells and hypertrophy in leaves of white clover inoculated wi...
متن کاملThe Relationship of Heterodera schachtii Population Densities to Sugarbeet Yields.
Sugarbeet yields were contpared with field populations of Heterodera schachtii Schmidt. The correlation between sugarbeet yields and viable larvae/g of soil was negative and high, but that between sugarbeet yields and viable cysts/g of soil was lower. Sugarbeet yields were also compared with H. schachtii populations by years of rotation with a nonhost crop. The coefficients of correlation (r) b...
متن کاملHost-Parasite Interaction of Resistant Sugarbeet and Heterodera schachtii.
The host-parasite relationships between Heterodera schachtii Schm. and the nematode-resistant diploid Beta vulgaris L. line '51501' were examined via serial sections of secondary rootlets. Second-stage larvae penetrated sugarbeet roots and migrated up to 1.95 mm before establishing permanent feeding sites. Most sedentary larvae were oriented parallel to the root axis or in various diagonal or f...
متن کاملChemical Control of Heterodera schachtii on Sugarbeet in California.
Received for publication 21 February 1978. 1Broom's Barn Experimental Station, Higham, Bury St. Edmunds, Suffolk, England. 2 Department of Nematology, University of California, Riverside, California 92521. 3Farm Advisor, Cooperative Extension, Santa Maria, California 93456. 4 Farm Advisor, Cooperative Extension, El Centro, California 92243. Much of this work was done while the senior author was...
متن کاملTolerance Limit of the Sugarbeet to Heterodera schachtii.
Field and greenhouse experiments showed that yield losses of sugarbeet, Beta vulgaris, did not occur in soil infested with fewer than eight Heterodera schachtii eggs/g soil. However, larger population densities greatly reduced sugarbeet yield. In the field experiment, the yield in microplots inoculated with more than 64 eggs/g soil was less than 20% of yields in uninoculated microplots. Neverth...
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ژورنال
عنوان ژورنال: Netherlands Journal of Plant Pathology
سال: 1986
ISSN: 0028-2944,1573-8469
DOI: 10.1007/bf01976374