Main

Late blight of potato

| Wed Jul 02 51203 10:26:40 GMT+0000 (Coordinated Universal Time)



Main
IMG_20190327_152448
INFECTED LEAF
IMG_20190327_141752

Conidiophores with conidia
IMG_20190327_152923
Lemon shaped conidia
IMG_20190327_152933
Conidia

Late blight of potato :

The section showing lemon shaped conidia of phytophthora infestans isolated by scrapping potato leaf from ICAR-NOFRI,Sikkim, as seen under foldscope

Symptoms

Late blight will first appear as water-soaked spots, usually at the tips or edges of lower leaves where water or dew tends to collect. Under moist, cool conditions, water-soaked spots rapidly enlarge and a broad yellow halo may be seen surrounding the lesion (Mohan et al., 1996). On the leaf underside, a spore-producing zone of white moldy growth approximately 0.1 – 0.2 inches wide may appear at the border of the lesion. Under continuously wet conditions, the disease progresses rapidly and warm, dry weather will slow or stop disease development. As conditions become moist and cool, disease development resumes. See pictures of late blight on stem and leaves.



Locations



Categories

Type of Sample
microorganisms
Foldscope Lens Magnification
140x

Comments