The present work investigated early hatching differences in naturally occuring field populations and newly reared populations of potato cyst nematodes from the Canary Islands. Hatching behavior of the two species appears to be distinct, with more juveniles hatched from G. pallida that hatch earlier and over a shorter time than G. rostochiensis. The hatching rate of 3-year-old PCN populations wa...

The study of invertebrate-and particularly nematode-viruses is emerging with the advancement of transcriptome sequencing. Five single-stranded RNA viruses have now been confirmed within the economically important soybean cyst nematode (SCN; Heterodera glycines). From previous research, we know these viruses to be widespread in greenhouse and field populations of SCN. Several of the SCN viruses ...

Cereal monocultures are very susceptible to many pests, especially those living on leaves, which largely affects yield by decreasing its quality. The most dangerous of them is the cereal leaf beetle (Oulema melanopus L.). In cases heavy infestation larvae, surface plants may be reduced 50%, and sometimes even 80%, with a main loss 10–25%. aim presented study was assess efficiency native isolate...

Plant-parasitic cyst nematodes secrete a complex of cell wall-digesting enzymes, which aid in root penetration and migration. The soybean cyst nematode Heterodera glycines also produces a cellulose binding protein (Hg CBP) secretory protein. To determine the function of CBP, an orthologous cDNA clone (Hs CBP) was isolated from the sugar beet cyst nematode Heterodera schachtii, which is able to ...

Prompt tillage after crop harvest was investigated as a cultural control for the tobacco cyst nematode, Globodera tabacum tabacum, on stalk-cut broadleaf cigar wrapper tobacco. Stalk stumps and roots remaining after harvest were destroyed by tilling immediately or from 2 to 6 wk after harvest in field experiments over 4 yr. Cyst nematode Pf/Pi ratios ranged from 0.65 to 1.62 when plants were ti...

Five viruses were previously discovered infecting soybean cyst nematodes (SCN; Heterodera glycines) from greenhouse cultures maintained in Illinois. In this study, the five viruses [ScNV, ScPV, ScRV, ScTV, and SbCNV-5] were detected within SCN greenhouse and field populations from North Carolina (NC) and Missouri (MO). The prevalence and titers of viruses in SCN from 43 greenhouse cultures and ...

Stem cell pools in the SAM (shoot apical meristem), RAM (root apical meristem) and vascular procambium/cambium are regulated by CLE-receptor kinase-WOX signaling modules. Previous data showed that cyst nematode CLE-like effector proteins delivered into host cells through a stylet, act as ligand mimics of plant A-type CLE peptides and are pivotal for successful parasitism. Here we report the ide...

Mark K. Nakhla, Kristina J. Owens, Wenbin Li, and Gang Wei, National Plant Germplasm and Biotechnology Laboratory, United States Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) PPQ-CPHST; Andrea M. Skantar, Nematology Laboratory, USDA Agricultural Research Service; and Laurene Levy, National Plant Germplasm and Biotechnology Laboratory, USDA-APHIS-PPQ-CPHST, ...

traditionally, in suburbs of tabriz city, northwest iran (gps 38˚06΄n, 46˚15΄e, mean temperature of 6.6-20.0°c, sandy loam soil type), different types of vegetables including cabbages have been cultivated for many years. the cabbage cyst nematode, heterodera cruciferae was reported as one of the plant parasitic nematodes infecting kohlrabi (brassica oleracea l. var. gongylodes) and white cabbag...