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Broadacre Field Crops DAFF QLD

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The images in the gallery relate to resistance of insects to phosphine and protectant insecticides in stored grain... A map of Australia showing areas of strong resistance to phosphine.. A figure showing weevils in stored grain in unsealed silos, and the treatment by phosphine fumigation...
GRDC Taxonomy:
While chickpeas are considered to have moderately high requirement for P, economic fertiliser responses to P are uncommon... The two exceptions are: soils with critically low P levels (below 6-8 mg P/kg, based on a Colwell test at 0-10cm) and no prior history of P fertiliser long fallow situations with low VAM levels (10 months or longer) even where soil levels are considered adequate... Some situations where N fertiliser may warrant consideration include: late plant situations where the crop can flower as quickly as 60 days, and rapid early growth is critical in achieving adequate height ...
Monitoring record sheets should show the following: numbers and types of insects found (including details of adults and immature stages) size of insects - this is particularly important for larvae date and time crop stage and any other relevant information (e.g. row spacings, weather conditions, and general crop observations)... Use the datasheets to record type, number and size of insects found on the beat sheet... Insect counts in crops with row spacing less than one metre must be converted to pests/m 2 ...
Melina Miles is a senior entomologist based in Toowoomba... As part of the entomology group she works on developing practical integrated pest management (IPM) strategies for mixed grain and cotton systems... Over the past 10 years Melina has worked on IPM in grains in Victoria and Queensland and on the area-wide management of helicoverpa on the Darling Downs...
GRDC Taxonomy:
Photograph of Fusarium wilt first observed as dead plants in field.. Photograph of a split-stem of cotton discoloured with Fusarium wilt.. Photo of cotton - black root rot stunted & healthy plants (Cotton)..
" Print the page Over recent years maize has been successfully grown in north Queensland for grain and silage... Maize has a number of features that make it well suited to north Queensland, including: high rainfall requirement cheap weed control options few pest and disease problems can tolerate rain at harvest a growing market in the north with the expansion of feedlots... Maize is grown mainly for the domestic market, either as grain for feed mixes or silage in areas close to dairies and feedlots...
GRDC Taxonomy:
Maize kernals showing the milk line at different stages.. While grain can physically be harvested at up to 25% moisture, this is not recommended as drying costs will be high... When the milk line is half way down the length of individual grains, its milk line score is said to be 2.5 (0 before the line becomes visible at the top of grains and 5 once the line is at the base of the grains)...
Crop weeds can most effectively be managed by integrating chemical and non-chemical control... Pre-plant application - herbicide is applied before the crop is planted and before rain allows weeds to germinate... Post-plant, pre-emergent application - herbicide may be applied to the seedbed after planting the crop, preferably before weeds and crop have germinated...
GRDC Taxonomy:
Late instar Helicoverpa larvae can vary greatly in colour and markings State of Queensland.. Life cycles of H. armigera and H. punctigera take 4-6 weeks from egg to adult in summer, and 8-12 weeks in spring or autumn... Not all pupae that form in late summer go into diapause: a proportion continues to develop, perhaps emerging during winter, or early in spring...
GRDC Taxonomy:
Green vegetable bugs (GVB) and brown bean bugs (BBB) are equally damaging to pulse crops but green vegetable bugs (GVB) are considered a more important pest due to their abundance, widespread distribution and rate of reproduction... The damage potential of other pod sucking pests is not as great as GVB but they can cause severe damage when present in large numbers... Using the example above - if you find that the three GVB and one RBSB are 2nd instars instead of adults and the two BSB are 4th instars - an additional calculation is required to convert these instars into adult equivalents...
GRDC Taxonomy:

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