Skip to main content

Please note that this site in no longer active. You can browse through the contents.

Early and Late Leaf Spots of Groundnut

AttachmentSize
RA 00080.pdf1.51 MB
Authors: 
McDonald, D. ;Subrahamanyam, P. ; Gibbons, R.W. ; and Smith, D.H.
Book
Publication Year: 
1985
Publisher Details: 
International Crops Research Institute for the Semi-Arid Tropics ; Patancheru 502324, Andhra Pradesh, India
Report/Series/Bulletin Name: 
Early and late leaf spots of groundnut / McDonald, D.
Report/series/Bulletin Number: 
1

 


Leaf spots are the most serious diseases of groundnut (Arachis hypogaea L.) on a wor ldwide scale. The two fungi commonly involved are Cercospora arachidicola Hor i , causing early leaf spot, and Phaeoisariopsis personata (Berk. & Curt.) v. Ar x 1 causing late leaf spot. The diseases have also been referred to as mycosphaerella leaf spots, cercospora leaf spots, brown leaf spots, peanut cercosporiosis, viruela, and t ikka. Leaf spots damage the plant by reducing the  available photosynthetic area, by lesion format ion, and by stimulating leaflet abscission. Worldwide, yield losses range from 10% to over 50%, but vary considerably from place to place  and between seasons. Yield losses are generally substantial when the crop is attacked by both leaf spots and rust (Puccinia arachidis Speg.). Figure 1 shows severe damage to groundnut crops caused by early leaf spot in the USA and Malawi , and by the combined attack of late leaf spot and rust in India.
0
Your rating: None