Sydney NSW, Australia
Request for information
2018-11-08T16:00:00.0000000Z
   0
Wanted: Photographs of eggs, larvae and pupae of the rice stem borer, Diopsis longicornis
Greetings from Uganda!

Does anyone have photographs of the eggs, larvae and pupae of the rice stem borer, Diopsis longicornis please? I am teaching our scouts to identify eggs (if that is possible) or later stages, for more timely crop protection. (Obviously Google didn't help!) Waiting for symptoms to appear always seems too late. 

Thanks in advance,

John
Dr J.S.Daniel
Head of Farming & Research
Kibimba Ltd (formerly known as Tilda Uganda Ltd)

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Uganda
Rice_stem_borer
Diopsis_longicornis

Responses

   0
2018-11-09T04:00:00.0000000Z

Pierre SILVIE pierre.silvie@cirad.fr [pestnet]

Try to find some in Ciradimages (web site of Cirad).
If not, after my return to France I can help you at least for some stages.

Pierre Silvie
CIRAD

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   0
2019-01-09T08:00:00.0000000Z

Dear John

I found here a factsheet about Diopsis thoracica where an egg and a larva and a nymph is present. I guess there is no very easy to see differences between species at these stages ?

I'll send your message to a taxonomist who did some identification for me..

Pierre

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   0
2019-01-09T18:00:00.0000000Z
Thank you Pierre for your response. I was not successful at finding the images. Please could you help?

Kind regards,

John

Dr J.S.Daniel
Head of Farming & Research
Kibimba Ltd (formerly known as Tilda Uganda Ltd)
Uganda

Posted on user's behalf
   2
2019-01-10T01:54:45.0000000Z

'Goergen, Georg (IITA-Benin)' g.goergen@cgiar.org [pestnet] <pestnet@yahoogroups.com>


Dear John, All I have at hand is a hi-resolution picture of the two main rice diopsid flies Diopsis thoracica and D. apicalis. As Pierre was saying I wonder whether if it is feasible for farmers to distinguish between different species for the immature stages. 

Best wishes Georg

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   0
2019-01-12T18:00:00.0000000Z
Dear Pierre, Georg,

Thank you both for the support. I will appreciate whatever image is available for Diopsis sp..

If the eggs/larvae are not too dissimilar among species, it will be useful as a start. The purpose is only to note the presence of eggs in the field so as to initiate control measures in time. It may not be crucial to distinguish between species for this purpose.

The fact sheet on D.thoracica should be helpful. Please do send.

Thanks and regards,

John

Dr J.S.Daniel
Head of Farming & Research
Kibimba Ltd (formerly known as Tilda Uganda Ltd)

Posted on user's behalf
   1
2019-01-13T14:00:00.0000000Z

Dear John, 

here is the factsheet, I am trying to find (at Cirad) the originals of photographs -if possible- to get better details...

Pierre

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