Vidyalelo
Agriculture · Q270

Agricultural Entomology

Graduate and Post Graduate · Agriculture · question 270

Q270

Type of oesophagus, where basal bulb has a refractive valve is

A.
Aphelenchoid type
B.
Criconematid type
C.
Neotylenchoid type
D.
Rhabditoid type
Answer

Answer: Option D

Solution

Answer: Option D
Solution:
Type of oesophagus, where basal bulb has a refractive valve is Rhabditoid type.
Esophagus rhabditoid with metacorpus slightly swollen, narrow isthmus surrounded by nerve ring, and large basal bulb with reduced valve. Esophago-intestinal valve is usually pronounced.