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Test for the presence of Rhizomania caused by Beet necrotic yellow vein virus (BNYVV) within soil. BNYVV can cause severe damage if the infection spreads into the whole plant.
Many plant species are susceptible to infection by foliar parasitic nematodes, leaf and bulb nematodes (Aphelenchoides spp.) and stem nematode (Ditylenchus dipsaci).
Powdery scab (Spongospora subterranea) is a fungal blemish disease of potatoes. A cosmetic defect with small lesions occurring in the early stages of the disease, progressing to raised pustules containing a powdery mass.
This testing for cereal crops covers both Barley yellow dwarf virus (BYDV) and Soil-borne cereal mosaic virus.
Pospiviroid positives detected by real time RT-PCR (TaqMan) are tested by RT-PCR and sequencing to try to identify and confirm the pospiviroid.
Potato spindle tuber viroid (PSTVd) effects tomato, pepper and other solanaceous hosts. Symptoms include stunting, severe yellowing and distortion of the leaves. PSTVd is seed transmitted. 1500 seeds are tested for Potato spindle tuber viroid (PSTVd) by real time RT-PCR (TaqMan). However, this TaqMan assay also detects Tomato chlorotic dwarf viroid (TCDVd), Mexican papita viroid (MPVd) and Tomato planta macho viroid (TPMVd).
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