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Catalogue: Broadacre Field Crops DAFF QLD
Microplitis is the main vector of ascovirus and so plays a key role in increasing the percentage of caterpillars affected by this disease... High levels of ascovirus may lead to a decline in Microplitis wasp populations... small pale caterpillars in unusually exposed situations (e.g. on a leaf) that look as though they have been feeding in the same place for some time, making a window in the leaf, are probably infected with ascovirus because infected caterpillars can take a long time to die, ascovirus infection in the population can show up in crop scouting data over a series of checks as a number of small caterpillars (shorter than 8 mm) in the crop, with very few medium-large caterpillars coming through...
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Catalogue: Broadacre Field Crops DAFF QLD
Microplitis is the main vector of ascovirus and so plays a key role in increasing the percentage of caterpillars affected by this disease... High levels of ascovirus may lead to a decline in Microplitis wasp populations... small pale caterpillars in unusually exposed situations (e.g. on a leaf) that look as though they have been feeding in the same place for some time, making a window in the leaf, are probably infected with ascovirus because infected caterpillars can take a long time to die, ascovirus infection in the population can show up in crop scouting data over a series of checks as a number of small caterpillars (shorter than 8 mm) in the crop, with very few medium-large caterpillars coming through...
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Catalogue: Broadacre Field Crops DAFF QLD
Microplitis is the main vector of ascovirus and so plays a key role in increasing the percentage of caterpillars affected by this disease... High levels of ascovirus may lead to a decline in Microplitis wasp populations... small pale caterpillars in unusually exposed situations (e.g. on a leaf) that look as though they have been feeding in the same place for some time, making a window in the leaf, are probably infected with ascovirus because infected caterpillars can take a long time to die, ascovirus infection in the population can show up in crop scouting data over a series of checks as a number of small caterpillars (shorter than 8 mm) in the crop, with very few medium-large caterpillars coming through...
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Catalogue: Broadacre Field Crops DAFF QLD
A two-toned caterpillar parasite - a newly emerged adult wasp from a host pupa.. Heteropelma are often seen flying above sorghum, cotton and other summer crops... Heteropelma stings caterpillars at third instar stage and older, although third and fourth instars (8-23 mm) are preferred...
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Catalogue: Broadacre Field Crops DAFF QLD
A two-toned caterpillar parasite - a newly emerged adult wasp from a host pupa.. Heteropelma are often seen flying above sorghum, cotton and other summer crops... Heteropelma stings caterpillars at third instar stage and older, although third and fourth instars (8-23 mm) are preferred...
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Catalogue: Broadacre Field Crops DAFF QLD
A two-toned caterpillar parasite - a newly emerged adult wasp from a host pupa.. Heteropelma are often seen flying above sorghum, cotton and other summer crops... Heteropelma stings caterpillars at third instar stage and older, although third and fourth instars (8-23 mm) are preferred...
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Catalogue: Broadacre Field Crops DAFF QLD
Adult orchid dupe showing orange and black sections and white spots on side of the body.. Male Lissopimpla excelsa wasps are commonly called the orchid dupe because they are tricked into pollinating orchids... Male Lissopimpla wasps mistake the flowers for females and attempt to mate with the flower, pollinating it in the process...
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Catalogue: Broadacre Field Crops DAFF QLD
Adult orchid dupe showing orange and black sections and white spots on side of the body.. Male Lissopimpla excelsa wasps are commonly called the orchid dupe because they are tricked into pollinating orchids... Male Lissopimpla wasps mistake the flowers for females and attempt to mate with the flower, pollinating it in the process...
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Catalogue: Broadacre Field Crops DAFF QLD
Adult orchid dupe showing orange and black sections and white spots on side of the body.. Male Lissopimpla excelsa wasps are commonly called the orchid dupe because they are tricked into pollinating orchids... Male Lissopimpla wasps mistake the flowers for females and attempt to mate with the flower, pollinating it in the process...
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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...
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