Insect pest risk
|High risk||Moderate risk||Low risk|
|Earth mites and lucerne flea|
|Late crops can be subject to first and second generations of Etiella||Moisture stress at early podding||Early planting ensures that most pods are set before moth activity occurs in spring|
|Slugs and snails|
|Slugs and snails*||Damaging||Damaging|
* Snails may also cause grain contamination at harvest
|Present||Present in crop but generally not damaging|
|Damaging||Crop susceptible to damage and loss.|
Key IPM strategies for lentils
- Economic damage is most likely to occur during establishment and from flowering until maturity.
- Lentils are useful as a rotation crop with canola and winter cereals as lentils can suppress red legged earth mite and blue oat mite populations – where weeds are also controlled. However, lentils will suffer damage from earth mites if populations are high.
- Lentils are tolerant of some foliar damage and compensate by producing secondary shoots
- Etiella degree-day model assists in forecasting moth flight activity (see the Etiella page for more details). Control of moths, before they lay eggs on developing pods, is critical to Etiella management. Transmission of viruses by aphids, in the early stages of crop growth is most damaging. Virus transmission typically occurs well before aphid colonies are evident. A pre-emptive and integrated management approach (taking into account the risk factors) is required to minimise the impact of virus.
- Where virus transmitting aphids are a threat – refer to management options in insects as virus vectors
- RLEM has been found to have high levels of resistance to two synthetic pyrethroids – bifenthrin and alpha-cypermethrin