Tundu disease (yellow ear rot) of wheat caused by Clavibacter tritici is usually associated with

✅ Explanation: Tundu disease (yellow ear rot) of wheat, caused by the bacterium Clavibacter tritici, is often associated with the seed gall nematode, Anguina tritici. The nematode creates galls in the wheat heads, providing entry points for the bacteria to infect the plant.

📌 Other Options Explanations:
-(a) Heterodera avenae: This is a cyst nematode that affects cereals, including wheat,
-(c) Meloidogyne incognita: This is a root-knot nematode, causing galls on roots,
-(d) Pratylenchulus sp.: These are lesion nematodes that feed on roots, causing damage

🔑Key Points:
-The factors of this disease are Corynebacterium tritici bacteria and Enzuina Titriki nematode.
-The 'tundu' disease is characterized by twisting of the stem, distortion of the earhead and rooting of the spikelets.
-The nematode involved in the disease causes wrinkling, twisting and various other distortions of the leaves and stem.
-As a result of this disease, the infected plants are shorter and thicker than the healthy plants.