Insect pest risk
|High risk||Moderate risk||Low risk|
|Early crops in a district at greater risk.||Use of non-selective sprays in the vegetative stage can flare helicoverpa and mites.|
|Dryland crops in dry summers, especially if there is an end of season drought with conditions favouring aflatoxin.||Irrigated peanuts with access to late season irrigation|
|Peanut scarabs (mostly found in krasnozem and euchrozem soils)|
|Crops following peanuts in the previous year, and with a peanut scarab history. Paddocks in sugar cane areas with cane grub history, especially in North Qld||Crops planted adjacent to paddocks planted with peanuts in the previous year, and with a peanut scarab history.|
|White-fringed weevil (WFW)|
|Crops following a previous WFW host, e.g. potatoes in NQ, or lucerne and chickpeas in other regions||Crops close to lucerne are at risk from weevils walking from that crop|
|Monolepta (redshouldered leaf beetle)|
|Proximity to sugar cane & horticultural hosts of this pest Atherton Tablelands region at greatest risk|
|Silverleaf whitefly (SLW)|
|Crops planted close to earlier maturing SLW hosts, especially cotton and cucurbits.||High SLW populations can infest less preferred hosts. Using non-selective chemicals in the vegetative stages may flare SLW|
|Two-spotted and peanut mites|
|Spraying non selective insecticides in the vegetative stages, may flare two-spotted mites||Increased risk of peanut mite infestations in drier years.|
|Lucerne leaf hopper|
|Cutting of lucerne hay crops in close proximity to peanuts||Stressed peanut crops|
|White fringe weevil||Damaging||Present||Present|
|Present||Present in crop but generally not damaging|
|Damaging||Crop susceptible to damage and loss|
Key IPM considerations for peanuts
- Peanuts are most susceptible to insect pests from flowering onwards.
- Peanuts can tolerate higher pest activity because it is indeterminate.
- In drought years, etiella is a major problem in dryland crops.
- Western flower thrips (WFT) are a potential threat to peanuts, mainly because they transmit tobacco spotted wilt virus (TSWV).
- Peanuts can compensate for early damage by setting new buds and pods to replace those damaged by pests.
- Excessive early damage can delay harvest.
- Mites can become a problem in late crops in some regions, particularly where there is widespread use of non-selective pesticides. Two-spotted mite in peanuts can be controlled by the release of mass produced predatory mites.