Weekly observations of helicoverpa trapping

Weekly observations to 1st November

This week (24th October to 1st November), the moth trapping network detected low numbers of (>15 individuals) of the native budworm (PDF 938.8 KB), Helicoverpa punctigera, at Cleve, Crystal Brook, Mannanarie, and Naracoorte. (Figure 1). Numbers of the cotton bollworm (PDF 1.1 MB), H. armigera, were also very low.
Where pulse crops are within a few weeks of desiccation and/or harvest, recent flights are likely to be too late for any resulting larvae to develop to a size that can cause significant damage. Crops remaining green for several days after windrowing are still susceptible to attack from large larvae (4th-5th instar, > 30-40mm in length).

There have been several reports recently of budworm in barely on the Southern York Peninsula (5-10 larvae per sweep average), and cereals on Kangaroo Island. Identity of the species has not been confirmed, but are likely to be the cotton bollworm or possibly the lesser budworm, Heliothis punctifera, as they were observed in cereals.

We are now wrapping up the Helicoverpa trapping program for this year. Many thanks to our volunteer trappers for your effort and participation: Andy Bates (Bates Ag Consulting), Chris Davey (YP Ag Kadina), Ben Farmer (Landmark Keith), Adam Hancock (Elders Naracoorte), Troy Maitland (EP Ag n Fert), Sarah Meyer (Cleve Rural Traders), Nigel Myers (Cummins Ag),  George Pedler (George Pedler Ag), Steve Richmond (Landmark Jamestown), and Iain Todd (Kerin Agencies Landmark).

More information on monitoring, thresholds and control: PestFacts Issue 8, 2018, Native budworm PestNote (PDF 938.8 KB) and Cotton bollworm PestNote (PDF 1.1 MB).

Weekly observations to 11 October

This week (3rd October to 11th October), the moth trapping network detected large flights (>200 individuals) of the native budworm, Helicoverpa punctigera, at Cummins, Yeelanna, and Mannanarie. Moderate flights (30-200 individuals) were observed at Crystal Brook, and light activity detected at Cleve, Kimba, Naracoorte, Port Broughton, and Streaky Bay, (Figure 1). Numbers of the cotton bollworm, H. armigera, were generally low, except in Cummins, where moderate flights were observed.

Based on these flight dates, and long term average temperatures, the target size of larvae for treatment (2-3rd instars, 10-15mm in length) should be present during the following dates: Cummins and Yelanna – 25th Oct to 9th Nov; Mannanarie – 31st Oct to 14th Nov; Cleve – 27th Oct to 12th Nov; Kimba – 23rd  Oct to 4th Nov; Naracoorte – 3rd Nov to 19th Nov; Crystal Brook and Port Broughton – 24th Oct to 6th Nov; Streaky Bay – 19th  Oct to 1st  Nov.

More information on monitoring, thresholds and control: PestFacts Issue 8, 2018, Native budworm PestNote and Cotton bollworm PestNote.

Sources: Troy Maitland (EP Ag n Fert), Iain Todd (Landmark), Chris Davey (YP Ag Kadina), Steve Richmond (Landmark, Jamestown), Andy Bates (Bates Ag Consulting), Sarah Meyer (Cleve Rural Traders), Nigel Myers (Landmark Cummins), George Pedler (George Pedler Ag).

Weekly observations to 4 October

This week (26th September to 4th October), the moth trapping network detected large flights (>200 individuals) of the native budworm (PDF 938.8 KB), Helicoverpa punctigera, at Cummins. Moderate flights (30-200 individuals) were observed at Yeelanna, Port Broughton, Crystal Brook, and Mannanarie, and light activity detected at Naracoorte, Kimba, Streaky Bay, and Keith (Figure 1). Numbers of the cotton bollworm (PDF 1.1 MB), H. armigera, were generally low, except in Cummins, where large flights were observed.

Based on these flight dates, and long term average temperatures, the target size of larvae for treatment (2-3rd instars, 10-15mm in length) should be present during the following dates: Cummins and Yelanna – 21st Oct to 7th Nov; Port Broughton and Crystal Brook – 20th Oct to 2nd Nov; Mannanarie – 25th Oct to 11th Nov;  Naracoorte – 29th Oct to 16th Nov; Kimba – 16th  Oct to 30th Oct; Streaky Bay – 19th  Oct to 1st  Nov; Keith – 25th  Oct to 12th Nov.

More information on monitoring, thresholds and control: PestFacts Issue 8, 2018, Native budworm PestNote (PDF 938.8 KB) and Cotton bollworm PestNote (PDF 1.1 MB).

Sources: Troy Maitland (EP Ag n Fert), Iain Todd (Landmark), Chris Davey (YP Ag Kadina), Steve Richmond (Landmark, Jamestown), Andy Bates (Bates Ag Consulting), Sarah Meyer (Cleve Rural Traders), Nigel Myers (Landmark Cummins), George Pedler (George Pedler Ag).

Weekly observations to 26 September

This week (19th September to 27th September), the moth trapping network detected large flights (>200 individuals) of the native budworm (PDF 938.8 KB), Helicoverpa punctigera, at Mannanarie and Streaky Bay. Moderate flights (30-200 individuals) were observed at Cummins and Port Broughton, and light activity detected at Naracoorte, Yeelanna and Cleve (Figure 1). Numbers of the cotton bollworm (PDF 1.1 MB), H. armigera, were generally low, except in Cummins, where moderate flights were observed. Based on these flight dates, and long term average temperatures, the target size of larvae for treatment (2-3rd instars, 10-15mm in length) should be present during the following dates: Mannanarie – 16th to 30th Oct; Streaky Bay – 12th to 24th Oct; Cummins and Yeelanna – 17th to 4th Nov; Port Broughton – 14th to 27th Oct; Cleve – 14th to 29th Oct; Keith and Naracoorte – 20th to 8th Nov. Low numbers of larvae were observed in canola crops around Jamestown (2-4mm in size) and near Kadina (1mm in size). For more information on monitoring, thresholds and control, see PestFacts Issue 8, 2018.

Weekly observations to 20 September

This week (12th September to 20th September), the moth trapping network detected large flights (>200 individuals) of the native budworm (PDF 938.8 KB), Helicoverpa punctigera, at  Mannanarie. Moderate flights (30-200 individuals) were observed at Kimba, Cummins, Yeelanna, Port Broughton, Crystal Brook, and Cleve, and light activity detected at Naracoorte (Figure 1). Numbers of the cotton bollworm (PDF 1.1 MB), H. armigera, were generally low, except in Cummins, where moderate flights were observed.

Based on these flight dates, and long term average temperatures, the target size of larvae for treatment (2-3rd instars, 10-15mm in length) should be present during the following dates: Mannanarie – 12th Oct to 1st Nov; Kimba – 4th to 20th Oct; Cummins and Yeelanna – 9th to 28th  Oct;  Port Broughton – 17th  Oct to 23rd Oct; Crystal Brook – 5th to 22nd Oct; Cleve – 3rd to 20th Oct.

Moderate numbers of larvae were observed in canola crops around Streaky Bay (2-3 grubs per 10 sweeps, 5-10mm in size).

More information on monitoring, thresholds and control: PestFacts Issue 8, 2018, Native budworm PestNote (PDF 938.8 KB) and Cotton bollworm PestNote (PDF 1.1 MB).

Sources: Troy Maitland (EP Ag n Fert), Iain Todd (Landmark), Chris Davey (YP Ag Kadina), Steve Richmond (Landmark, Jamestown), Andy Bates (Bates Ag Consulting), Sarah Meyer (Cleve Rural Traders), Nigel Myers (Landmark Cummins), George Pedler (Carrs Seeds).

Weekly observations to 13 September

This week (5th September to 13th September), the moth trapping network detected large flights of the native budworm (PDF 938.8 KB), Helicoverpa punctigera, at Mannanarie, Kimba, Yeelanna, Cummins, and Port Broughton. Moderate flights were also detected at Crystal Brook, Streaky Bay (to 5th Sep), and Cleve, and light activity detected at Naracoorte (Figure 1). Numbers of the cotton bollworm (PDF 1.1 MB), H. armigera, have generally remained low, except in Port Broughton (10th Sep), where moderate flights were observed.

Based on these flight dates, and long term average temperatures, the target size of larvae for treatment (2-3rd instars, 10-15mm in length) should be present during the following dates: Mannanarie – 12th Oct to 1st Nov; Kimba and Port Broughton – 2nd to 19th Oct; Cummins and Yeelanna – 4th to 24th Oct; Crystal Brook – 4th to 21st Oct; Streaky Bay – 26th Sep to 11th Oct; Cleve 3rd to 20th Oct.

High numbers of larvae (20-30 per 10 sweeps) of a range of sizes (5-25 mm) have been observed in vetch and lentil crops around Kimba, and moderate numbers observed in lentil crops around Kadina (3 grubs per 10 sweeps, 5-15mm in size).

More information on monitoring, thresholds and control: PestFacts Issue 7, 2018, Native budworm PestNote (PDF 938.8 KB) and Cotton bollworm PestNote (PDF 1.1 MB).

Sources: Troy Maitland (EP Ag n Fert), Iain Todd (Landmark), Chris Davey (YP Ag Kadina), Steve Richmond (Landmark, Jamestown), Andy Bates (Bates Ag Consulting), Sarah Meyer (Cleve Rural Traders), Nigel Myers (Landmark Cummins), George Pedler (Carrs Seeds).


Weekly observations to 6 September

This week (29th August to 6th September), the moth trapping network detected large flights of the native budworm (PDF 938.8 KB), Helicoverpa punctigera, at Kadina (3rd Sep), Mannanarie (4th Sep), and Kimba (31st Aug). Numbers of the cotton bollworm (PDF 1.1 MB), H. armigera, have generally remained low.

Based on these flight dates, and long term average temperatures, the target size of larvae for treatment (2-3rd instars, 10-15mm in length) should be present during the following dates: Kadina – 24th Sep to 12th Oct; Mannanarie – 11th Oct to 2nd Nov; Kimba – 25th Sep to 15th Oct.

High numbers of larvae (20-30 per 10 sweep) of a range of sizes (5-25 mm) have been observed in vetch and lentil crops around Kimba. More information on monitoring and control: PestFacts Issue 7, 2018, Native budworm PestNote (PDF 938.8 KB) and Cotton bollworm PestNote (PDF 1.1 MB).

Sources: Troy Maitland (EP Ag n Fert), Iain Todd (Landmark), Chris Davey (YP Ag), Steve Richmond (Landmark)

Page Last Reviewed: 06 Sep 2018
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