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helicoverpa population

Catalogue: Broadacre Field Crops DAFF QLD
Image of a Microplitis demolitor wasp stinging a helicoverpa larva.. Microplitis adult aproaching a helicoverpa larva... Look for them flying above the crop or use a sweep net to sample the crop collect caterpillars shorter that 15 mm and perform the split test to estimate percent parasitism (number parasitised total larvae split x 100) look for visible signs of parasitoid activity, e.g. the distinctive fawn cocoons and/or small pale caterpillars that might be infected with ascovirus cross-check crop scouting data - if eggs and very small caterpillars do not seem to be developing through to larger caterpillars (>15 mm), this may be due to Microplitis activity...
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Catalogue: Broadacre Field Crops DAFF QLD
Image of a Microplitis demolitor wasp stinging a helicoverpa larva.. Microplitis adult aproaching a helicoverpa larva... Look for them flying above the crop or use a sweep net to sample the crop collect caterpillars shorter that 15 mm and perform the split test to estimate percent parasitism (number parasitised total larvae split x 100) look for visible signs of parasitoid activity, e.g. the distinctive fawn cocoons and/or small pale caterpillars that might be infected with ascovirus cross-check crop scouting data - if eggs and very small caterpillars do not seem to be developing through to larger caterpillars (>15 mm), this may be due to Microplitis activity...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Image of a Microplitis demolitor wasp stinging a helicoverpa larva.. Microplitis adult aproaching a helicoverpa larva... Look for them flying above the crop or use a sweep net to sample the crop collect caterpillars shorter that 15 mm and perform the split test to estimate percent parasitism (number parasitised total larvae split x 100) look for visible signs of parasitoid activity, e.g. the distinctive fawn cocoons and/or small pale caterpillars that might be infected with ascovirus cross-check crop scouting data - if eggs and very small caterpillars do not seem to be developing through to larger caterpillars (>15 mm), this may be due to Microplitis activity...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Helicoverpa is less damaging in peanuts than other legume crops but high populations can inflict significant damage... Peanuts have a high tolerance of defoliation with high populations of 12/m 2 having little impact on yield in well grown crops... Good agronomy and soil moisture are crucial as large, vigorously-growing plants suffer less defoliation for a given helicoverpa population and have less risk of damage...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Helicoverpa is less damaging in peanuts than other legume crops but high populations can inflict significant damage... Peanuts have a high tolerance of defoliation with high populations of 12/m 2 having little impact on yield in well grown crops... Good agronomy and soil moisture are crucial as large, vigorously-growing plants suffer less defoliation for a given helicoverpa population and have less risk of damage...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Helicoverpa is less damaging in peanuts than other legume crops but high populations can inflict significant damage... Peanuts have a high tolerance of defoliation with high populations of 12/m 2 having little impact on yield in well grown crops... Good agronomy and soil moisture are crucial as large, vigorously-growing plants suffer less defoliation for a given helicoverpa population and have less risk of damage...
Related categories: