I have had a quick look at relevant websites in Australia as the crop is very important here and have also contacted a few people.

In Queensland we suggest you contact Richard Piper at South Johnson Research Station,  Email; richard.piper@daf.qld.gov.au

There is also a a website that mentions a mealybug on banana here: https://www.daf.qld.gov.au/business-priorities/agriculture/plants/fruit-vegetable/insect-pests/cryptic-mealybug and there may be contacts who can help

In Western Australia, there are similar government services that might help. https://www.agric.wa.gov.au/bananas/pest-management-bananas-oria

Have a look at these and let us know know more about your problem if you do not get the information you seek

Best wishes

grahame

I have also looked on the old Pestnet website where we have stored summaries of past submissions.

www.pestnet.org >pests > insects> aphids, psyllids, scales & mealybugs, etc > and then type "banana mealybug" in the search space

OR just go here: http://www.pestnet.org/Home/SearchResults.aspx?q=banana+mealybug

There may be information here that is useful to you.

All the best

grahame

Thanks I will check these out.