Nematode Workshop 2 nd Morning Session Signs and
- Slides: 37
Nematode Workshop 2 nd Morning Session Signs and symptoms of damage of nematodes on vegetable and small fruit crops George S. Abawi and Beth K. Gugino Department of Plant Pathology
General field symptoms include Reduced growth Yellowing of foliage (nutrient deficiency-like) Excessive wilting in hot or dry weather Reduced yields Poor quality produce Symptom severity are nematode density dependent.
Accompanying root symptoms include Galls, stubby roots, excessive branching Necrotic lesions and general discoloration Rots Ditylenchus destructor Meloidogyne hapla
Most important nematodes on vegetables in the Northeast Northern root-knot Meloidogyne hapla Root-lesion Pratylenchus penetrans Cyst nematodes Heterodera schachtii Globodera rostochiensis
Northern Root-Knot Nematode (Meloidogyne hapla) on Carrot
Vydate applied at planting No Vydate at planting
Symptoms of NRKN infection on young and mature carrots
Marketable 0 1 Unmarketable 2 3 4 5
Northern Root-Knot and Lesion Nematode Damage on Onion infested not infested
Symptoms of nematode infestation in an onion field
Meloidogyne hapla
Close-up of rootknot nematode damage on onion roots Thick neck and reduced bulb size Galls on roots
Root-lesion nematode (Pratylenchus penetrans) in an onion root eggs juveniles
Pratylenchus penetrans Lesions on soybean root
Northern Root-Knot Nematode (Meloidogyne hapla) on Lettuce
Healthy lettuce plants Stunted and uneven growth due to nematode infection
Galls on lettuce root system Galls on lettuce with stained egg sacs
http: //starklab. slu. edu/Bio 2000/clover Nodulation on clover
Symptoms of a heavy nematode infestation in a potato field
Golden Potato Cyst Nematode (Globodera rostochiensis) Photo credit: Christopher Hogger, Swiss Federal Research Station for Agroecology and Agriculture, Bugwood. org
Lesions from P. penetrans infection on potato tubers Lesions from P. penetrans infection on potato roots
Root-knot
Potato Early Dying Disease (PED) Potato early dying disease (PED) (Pratylenchus penetrans + Verticillium dahliae)
No galls develop on the primary roots
Northern Root-Knot Nematode (Meloidogyne hapla) galls on the fine potato roots
Severe damage to potato by M. hapla
Sugar beet cyst nematode (Heterodera schachtii) damage in a beet field
Sugar beet cyst nematode on beet seedling roots female cyst
Lifecycle of Heterodera schachtii
Sugar beet cyst nematode (Heterodera schachtii) damage in cabbage microplot trial, NYSAES, 1983 Infested with H. schachtii Uninfested
Roots of cabbage grown in soil heavily infested with H. schachtii (right) vs. uninfested soil (left) Small loose cabbage head from plant grown in soil heavily infested with H. schachtii (right) vs. uninfested soil (left)
Yield of cabbage grown in heavy textured soil infested with increasing densities of sugar beet cyst nematode (Heterodera schachtii), NYSAES, 1983 Fumigated 10 eggs/cc 20 eggs/cc 40 eggs/cc
Tomato roots grown in uninfested (left) and soil infested (right) with Meloidogyne hapla
UF factsheet
UF factsheet
Root-knot nematode (Meloidogyne spp. ) damage on bean in the field and severe galling on the roots.
Stubby root nematode (Paratrichadorus christiei) damage on corn roots
- Divided highway begins sign
- Nematoda annelida
- Nematode
- Botulus microporus
- Red ring nematode
- Pinworms
- Nematode
- Natural and conventional signs examples
- Triangular signs are used exclusively for _____ signs.
- The diamond shape is used exclusively for _____ signs.
- Morning i see you in the sunrise
- Good morning english class
- Brother john lyrics
- Good afternoon teachers
- Good morning, class.
- Good morning nice to see you
- Informal greetings and responses
- Buenos afternoon
- Unit 6 level d synonyms and antonyms
- Vocabulary workshop level d unit 13
- Factual description meaning
- Vocabulary workshop level g unit 12
- Unit 5 level f vocab
- Vocabulary workshop level f unit 8 synonyms and antonyms
- Monty's noodles montmorency
- Pros and cons of reading workshop
- Brazing hearth diagram
- Antonym for amenity
- Vocabulary workshop level d unit 13 synonyms and antonyms
- Windows 7 compatibility center
- Welcome to new session 2020-21
- Session
- Skill 18: anticipate the topics
- Team norming session
- 6 session name
- Session title examples
- Asp.net session management
- Stateful session bean life cycle