Sumitomo Chemical, a renowned agro-chemical company, has always had an upper hand in creating awareness among the farming community of India. It has shown its presence in the Punjab region too. Sumitomo Chemical company is now educating the farmers of Jalandhar, focusing mainly on the potato cultivators of the region.
The main disease of the region being the black scurf caused by Rhizoctonia solani, was highlighted by the company.
The following are the symptoms of the disease:
- Black speck, black speck scab, russet scab on tubers
- At the time of sprouting dark brown colour appear on the eyes
- Affected Xylem tissue causes to wilting of plants
- Infected tuber contains russeting of the skin
- Hard dry rot with browning on internal tissue
- Spongy mass appear on the infected tuber.
- Seed tubers are source of spread
- Moderately cool , wet weather and temp 23 °C are the favourable for the development of disease
About pathogen:
The mycelium is hyaline when young and brown at maturity. Hyphae are septate and branched with a characteristic constriction at their junction with the main hyphae. The branches arise at a right angle to main axis. Sclerotia are black. A basidium bears four sterimata each with a basidiospore at the end. The basidiospores are hyaline, elliptical to obovate and thin walled. They are capable of forming secondary basidiospores.
Mode of spread and survival:
The fungus is capable of leading a saprophytic life on the organic material and can remain viable in the soil for several years. The sclerotia on the seed tubers is the principal source of infection of the subsequent crop raised with these tubers. On return of favourable conditions the mycelium present in the soil may develop producing new hypae.
Management:
Disease free seed tubers alone should be planted. If there is a slight infection of black scurf in the harvested potatoes it can be controlled by spraying 250
ml per pump Valida spray on 6-7 quintals potato, change the side and then spray
once more with the new solution of same dose and dry it in shade or dip them in 250 ml per 100 Ltr of
water dipping for 6-7 quintals of potato and dry it in shade.
#These blogs were written as a part of the internship program at Sumitomo Chemicals.
#These blogs were written as a part of the internship program at Sumitomo Chemicals.
Keep it up
ReplyDeletePotato treated by VALIDAcin can be stored for more time compare to other contact fungicide, which are more popular also (Every potato grower and association in Jalandhar knows names of those contact fungicides name with brand name ) (Person who have more then 20 year experience in cold storage in Jalandhar said it.)
ReplyDeletevery we'll of us of drenching
ReplyDelete