Major Pea diseases are given below:-
1.Fusarium wilt: Fusarium oxysporum f.sp. pisi
- The first symptom of the disease in the field is drooping of the plants followed by sudden death. The leaves may also turn yellow and drop off prematurely.
- Pod formation is severely affected. In collar regions of the wilted plants, necrosis and discolouration can be seen.
- The diseased plants can be pulled out from the easier than the healthy ones.
- When the diseased stem is cut, there is a dark brown, discoloured band around the vascular system. Infection occurs directly through the root hairs.
- The fungus survives for indefinite periods in the soil.
- Treating the seeds with Carbendazim (2 g/kg of seed) protects the seedlings during the initial stages of growth.
- Soil drenching with Copper oxychloride 0.25%.
2 .Powdery mildew of Pea: Erysiphe polygoni
- The disease appears as on the foliage and pods.
- Infection is first apparent on the leaves as small slightly darkened areas, which later become white powdery spots.
- These spots enlarge and cover the entire leaf area.
- Severely infected leaves may become chlorotic and distorted before falling. Affected pods are small in size and malformed.
- Spray inorganic sulphur 0.25% or Tridemorph 0.1%.
3. Pea Rust :Uromyces fabae
- This often becomes serious in humid regions.
- The plants dry up quickly and the yield is considerably reduced.
- The initial symptoms of the rust infection are flecking of the leaves.
- These flecks soon develop into reddish brown pustules, frequently merging into one another, finally bursting to expose a mass of brown spores.
- The entire leaf blade and other affected parts give a brownish appearance even from a distance.
- Fungicidal application using Tridemorph 0.1 % or Mancozeb 0.25% effectively control the disease.
- TamilNadu Agritech Portal