- Affected pods go grey inside in the early stages, then the whole pod rots (left); note the characteristic small black resting bodies on the stem (right)
- Collar rot or lasiodiplodia: bushes rapidly wilt and rot at ground level
Major problem in the Central and South Burnett, but is known in all peanut-growing areas.
Losses can be severe, up to total crop loss across an entire paddock. The disease seems to be worse where the soil is degraded through erosion or scalping during land levelling.
A rapid collapse of plants due to complete rotting of the roots and stems at ground level. Plants die throughout the season. Infection occurs at soil level where stems and crowns suffer from heat stress, soil abrasion or drought.
Nothing can be done for an affected crop.
Rotation of at least two years in other crops should reduce the level of spores in the soil.
To minimise risk, plant early and consider planting on beds to obtain ground cover before the middle of summer.
Chemical registrations and permits