As a part of a new insecticide resistance management strategy in grain crops, growers and agronomists are looking to rotate insecticides for Helicoverpa sp. control. Following enquiries from industry, DAF entomology have been conducting research on the range of newer insecticides available for controlling Helicoverpa larvae. In work previously published on the Beatsheet, we have demonstrated the efficacy of these… Read more »
As more growers and agronomists look to rotate insecticides for helicoverpa control in grain crops as part of a sound resistance management strategy, uncertainty about how to tell if larvae are actually dying, or had escaped control for some reason has emerged as a concern in some instances. These cases, where larvae have not died as quickly as expected, have… Read more »
The Helicoverpa pheromone trapping program has recently concluded for the 2017 Winter/Spring season. The program, run by the Queensland Department of Agriculture and Fisheries for the Northern Grain Growing region, forms part of the national Helicoverpa monitoring network jointly run by cesar, SARDI, and DAFWA. The primary purpose of the trapping network is to detect high moth activity, for both… Read more »
Sorghum is most susceptible to crop loss from insect pests during flowering and grain fill, and this article deals mostly with these species (sorghum midge, helicoverpa and Rutherglen bug). However, some years there may be pest infestations in vegetative sorghum. Vegetative sorghum During the vegetative stages you may see a few armyworm or helicoverpa larvae causing shot-holes in the leaves,… Read more »
Helicoverpa are the primary insect pest of chickpeas. Beneficial insects that are present in many crops do not thrive in chickpeas, so successful helicoverpa management relies heavily on monitoring and identification, appropriately timing control to crop stage, and using the recommended thresholds. Monitoring involves regular in-field checking with a beat sheet. Additionally, moth numbers can be monitored using pheromone traps… Read more »
Large flights of helicoverpa over the last 2 weeks (or longer in some districts) have seen significant eggs lays and larval populations in winter crops, including the winter cereals. It is not unusual to find both corn earworm and armyworm in cereal crops. Correct identification of the species present is very important as it influences damage potential and choice of… Read more »
Helicoverpa punctigera numbers in pheromone traps look to be on the increase through September. The continued migration of H. punctigera through spring is likely, if suitable weather systems occur, and it is likely that all susceptible crops (chickpea, canola, faba beans, spring mungbeans, spring sunflowers) will experience helicoverpa pressure through October and November. Peter Gregg and Alice Del Socorro (University… Read more »
As the early and moisture stressed crops finish up, and those that were under a storm kick on, it is challenging to try and estimate whether small helicoverpa larvae in the crop should be controlled, or whether the crop will finish up before they get to a damaging size. There are a few things to keep in mind when making… Read more »
Helicoverpa moth activity to 19 October, 2015. Over the past 1-2 weeks we have seen increasing H. armigera catches in the pheromone traps across Queensland (Qld) and northern New South Wales (NSW). The series of graphs of H. armigera and H. punctigera trap catches from August to 19 October are below. Included with these graphs are the current predictions for… Read more »
Helicoverpa pheromone trap catches to 18 September 2015 This information is updated weekly on Fridays and/or the following Monday. Where the data for the current week is not yet available, click on the location marker to see data from previous weeks. The Northern region pheromone trap network is part of a national network of traps being run in 2015, funded… Read more »
