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Describe the relative size of plant feeding nematodes. -
ANSWER-Great variability. Range from 0.25 um to 12 mm
in length.
Heterodera spp. symptoms - ANSWER-Stunted plants.
Yellow foliage. Wilting plants. Severely reduced yields.
Cysts are visible to naked eye.
Heterodera spp. management - ANSWER-Crop rotation.
,Longidorus spp. - ANSWER-Needle nematodes
Longidorus spp. host range - ANSWER-Broad host range
Longidorus spp. life cycle - ANSWER-Migratory
ectoparaasite. Feeds at root tips. Males are rare,
reproduction likely by pathenogenesis.
Longidorus spp. symptoms - ANSWER-Galls formed at
root tips, devastating to seedlings
Longidorus management. - ANSWER-Preplant
nematicides, timing to plant when soil temps are below
22C
,Meloidogyne spp. - ANSWER-Root-knot nematode
Meloidogyne arenaria - ANSWER-Peanut root-knot
nematode
Meloidogyne chitwoodi - ANSWER-Columbian root-knot
nematode
Meloidogyne hapla - ANSWER-Northern root-knot
nematode
Meloidogyne incognita - ANSWER-Southern root-knot
nematode
, Meloidogyne javanica - ANSWER-Javanese root-knot
nematode
Meloidogyne naasi - ANSWER-Barley root-knot nematode
Meloidogyne spp. host range - ANSWER-Very broad host
range
Meloidogyne spp. life cycle - ANSWER-Sedentary
endoparasite. J2 infective. Males veriform, females
saccate. Males not required. Sexually dimorphic.