A Comparison of the Hatching of Juveniles from Cysts of Heterodera schachtii and H. trifolii.
نویسندگان
چکیده
The effects of root diffusates of selected plants within the families Chenopodiaceae and Cruciferae and the hatching agent zinc chloride were tested for their effects on hatching and emergence of juveniles from cysts of Heterodera schachtii and a race of H. trifolii parasitic on Chenopodaceae and Cruciferae in The Netherlands. Although all diffusates strongly stimulated hatching of juveniles of H. schachtii, their effects on H. trifolii were less evident.
منابع مشابه
Comparative Morphometrics of Eggs and Second-Stage Juveniles of Heterodera schachtii and a Race of H. trifolii Parasitic on Sugarbeet in The Netherlands.
Measurements of second-stage juveniles of Heterodera schachtii from California and The Netherlands and a race of H. trifolii from The Netherlands were obtained and compared to determine if these populations can be differentiated by morphometrics. Juvenile lengths of 10 specimens from each of 10 cysts of each population were measured. Dimensions of tail regions of 20 juveniles from individual cy...
متن کاملDifferentiation of Cysts of Heterodera schachtii and H. trifolii by Fenestral Length.
The sugarbeet cyst nematode, Heterodera schachtii Schmidt, 1871, was discovered by Mai et al. (4) in fields of 16 New York State commercial red table beet growers during a survey in 1970-1971. They reported that the clover cyst nematode, H. trifolii Goffart, 1932, which also has lemon-shaped cysts with bullae, was present in very low numbers in many of the fields sampled. Thus a rapid and relia...
متن کاملSusceptibility of plant selections to Heterodera schachtii and a race of H. trifolii parasitic on Sugarbeet in The Netherlands.
Similar host ranges were found for Heterodera schachtii and a race of H. trifolii parasitic on sugarbeet in The Netherlands. Twenty-nine of 41 plant accessions evaluated were susceptible to H. trifolii. Five breeding lines of the interspecific hybrid Beta vulgaris-B. procumbens which are resistant to H. schachtii were highly susceptible to H. trifolii. An accession of B. maritima with partial r...
متن کاملEffects of Selected Nematicides on Hatching of Heterodera schachtii.
Aldicarb, carbofuran, fensulfothion, and phenamiphos were tested in concentrations of 1-100 mug/ml for their effects on hatching of Heterodera schachtii. Exposure of cysts to 1 mug aldicarb or carbofuran/ml stimulated hatch whereas phenamiphos and, to a lesser degree, fensulfothion inhibited hatch. Addition of aldicarb to sugarbeet root diffusate or 4 mM zinc chloride suppressed activities of t...
متن کاملInvasion 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...
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ورودعنوان ژورنال:
- Journal of nematology
دوره 14 4 شماره
صفحات -
تاریخ انتشار 1982