Peanut Diseases & Insects SCSC 306: Grain, Fiber, & Oilseed Crops Wayne Smith Professor,...

PeanutDiseases & Insects

SCSC 306: Grain, Fiber, & Oilseed Crops

Wayne Smith

Professor, Cotton Breeding

Office: (979) 845-3450

Email: cwsmith@tamu.edu

OSU Extension

SCSC 306: Peanut Diseases

OSU Extension

SCSC 306: Peanut Diseases

Number of “rots” affect peanuts. Limb rot is an example. Control of all of the “rots” are similar as shown below.

OSU Extension photo/comments

SCSC 306: Peanut Diseases

SCSC 306: Peanut Diseases

Photo: courtesy of OSU Coop. Ext. Service

SCSC 306: Peanut Diseases

Root-knot nematodes can be effectively controlled with crop rotation; However, root-lesion nematodes are moreDifficult to control.Crop rotation has not been effective in reducing levels of this species because it has a wide host range and can reproduce on most rotational crops .

Leaf spots, caused by Cercospora or Cercosporidium fungi, are the most common and serious diseases of peanut. Control is by field sanitation and fungicides. (see next slide) [Photos from OSU Cooperative Extension]

SCSC 306: Peanut DiseasesLeaf Spots

Early and Late Leafspots in peanut (slide 2)SCSC 306: Peanut Diseases

OSU Cooperative Extension

SCSC 306: Peanut Diseases

Scerotinia Blight is probably the most serious disease of peanut in Texas

Photos: OSU Extension

SCSC 306: Peanut Diseases

SCSC 306: Peanut Diseases

PSV is seed borne and aphid transmitted; Control is by avoiding seed not certified to be PSV free; no chemical nor host plant resistance (chemical control of aphid may help)

OSU

Coop.

Ext.

SCSC 306: Peanut Diseases

Spread is vectored by thrips and thus control of thrips with insecticide may be mandated; not transmitted through seed.

Photos: OSU Extension

SCSC 306: Peanut Diseases