Locusts and grasshoppers are active across large areas of western Queensland and NSW and central Queensland. Reports of the Australian Plague Locust, Migratory Locusts, Yellow winged locust and spur-throated locust have been received from areas around St George to the Central Highlands during January and early February. It has been several years since we have seen such high locust and grasshopper… Read more »
In the autumn and early winter of 2014, large areas of canola in South Australia, Victoria and southern NSW were heavily infested with green peach aphid (GPA), and many of the infested crops tested positive for beet western yellows virus (BWYV). GRDC TV has compiled a series of three videos that discuss what factors contributed to the GPA outbreak, and… Read more »
Rutherglen bug (RGB) numbers in canola stubble are again high in some fields. These infestations pose a risk to neighbouring crops, either through damage to establishing summer crops or contamination of unharvested winter crops. Both the canola and adjacent crops warrant monitoring for RGB infestation and movement out of the canola field. If large number of nymphs move into adjacent fields with seedling… Read more »
As canola sets and matures pods, and spring temperatures rise, there are a number of caterpillar pests that are active in this crop. Along with helicoverpa there are diamondback moth larvae (Plutella xylostella) and cabbage white butterfly larvae (Pieris rapae) in crops. It is critical that you can distinguish the species, and be familiar with their respective thresholds, in order… Read more »
As temperatures start to warm up there are a number of insect pests becoming active and causing crop damage. This post provides an overview of current and potential issues for field crops.
Paul Grundy, Adam Quade and Richard Lloyd have established 8 trial sites in the Spring Ridge area to evaluate the impact of simulated aphid damage on flowering canola. Treatments simulate aphid infestations that limit flowering and pod set. Low, medium and high intensity damage applied in replicated trials. Assessments to made on time to maturity, plant architecture, yield, and quality.
Insect management in grain crops workshop for advisers and growers (September 2014) These 1-day workshops for advisers and growers will explore effective and sustainable management strategies, with a focus on pests of local significance. The morning sessions are indoors, and the after lunch sessions in the field (weather permitting) to discuss practical aspects of pest identification, scouting and management. Wednesday… Read more »
As the warm weather persists, insect activity is remaining high. DAFFQ Entomology has received numerous reports of aphids, and leaf-feeding caterpillars. The aphids have been identified as cowpea aphid and the caterpillars as one of the summer-active armyworm species, Spodoptera exigua (lesser armyworm). The concerns about these are for the potential for crop loss caused by direct feeding damage/defoliation or virus… Read more »
Over the past couple of weeks there have been reports of whitefly adults infesting canola in the Central West and Lachlan regions of NSW. This is not an occurrence that has been recorded before, so we don’t know conclusively what the outcome will be of these infestations. What I have done is pulled together information on whitefly that will help… Read more »
DAFF Queensland Entomologist, Hugh Brier, is the 2014 Northern region recipient of GRDC’s Seed of Light. The Seed of Light is presented each year to someone who makes a significant contribution to communicating the outcomes of research.