Limring som fungerar - tips?, svartmyror hittar ändå upp på bigarråträdet Alternativ

[oliv]

Jag har problem med svartmyror på bigarråträdet (blir svart pga alla bladlöss).
Jag har försökt med olika typer av limring. Kardborreband med kletig substans (efter ett tag gick ändå myrorna över), plast med en kletig sida som träs på med metalltråd (för att inga myror skulle krypa under plastet fick jag snöra in stammen hårt med metalltråden med följd att stammen fick fula märken - det låter inte bra att försvaga trädet med sår på barken - bra hälsa - starkt försvar är mitt motto), nu i år försökte jag med kletig plast och kardborre, men ändå går myrorna efter ett tag över sina egna döda kroppar! Jag har alltså inte hittad en bra lösning.

Är det någon som har lyckats bli av med myrorna?

[KURT]

Jag förstår bara inte hur svårt det kan vara att läsa innantill i vanliga reviewartiklar?

"Ledoux ( 82 ) observed workers of O. longinoda carrying young
coccids to newly built nests and, more significantly, Way ( 144) proved
experimentally that they carry them to, and establish them on twigs outside
the nests ; each worker carried one young larva of Saissetia zanzibarensis,
placed it in position and solicited it for a few seconds before departing.
Ledoux (82) reports that larval and adult Membracidae are not carried by
O. longinoda workers but are "herded" by the ants into new feeding sites
which are always outside the nests. The building of silken shelters and the
"herding," as distinct from the carrying of attended Homoptera, seem to
be further interesting modifications of brood care behaviour.
The other well-substantiated example of transport is from Biinzli's
(27) work on species of Acropyga which are the tropical equivalent of
Lasius and appear to behave rather like Lasius to their attended coccids.
In its nests Acropyga paramaribensis may tend at least five species of root
feeding coccids of which Neorhizoecus coffeae is typical. When the coccids
mature, honeydew production ceases and they are transported by the worker
ants to chambers which are separate from those containing the ant brood
and immature stages of the coccid. The newly laid coccid eggs are carried
back to the brood chambers where they may be mixed with coccid larvae
and with the ants' eggs and larvae. The most remarkable feature of the
association is that each of the virgin females of the ant carries an already
fertilized first instar female coccid in her mandibles when departing on the
nuptial flight. Biinzli refers to similar behaviour by virgin queens of other
Acro pyga and Cladomyrma spp.
Other ant species are said to transport their attended Homoptera though
some of the published evidence needs to be substantiated. In Jamaica,
Coccus viridis was thought to be disseminated in citrus plantations by species
of Solenopsis and Crematogaster spp. ( 43 ) . In the Philippines, Dysmicoccus
brevipes (Cockerell ) is said to be carried to pineapple fields by S olenopsis
and Crematogaster spp. ( 124 ) , and in West Africa by Campanotus,
Crematogaster, and Pheidole ( 1 15 ) . C ampanotus spp. may also transport
coccids to young coffee plants in W. Africa ( 38) . Strickland's ( 134 ) observation
that crematogasterine ants carried Planococcoides njalensis from
felled to nearby living cocoa trees is confirmed by Cornwell ( 32) who found
that this happened uncommonly even with Crematogaster striatula Emery
which carried more than Crematogaster african a Mayr."

"Finally, there is the remarkable example of the pseudococcid genus
Hippeococcus described by Reyne ( 1 16 ) from Java. All of the known
species are associated with ants of the genus Dolichoderus which tend them
on twigs and fruits of various shrubs and trees as well as in underground
nests where mature females predominate. When disturbed, the very active
young larvae climb onto the bodies of the ants while others are collected
by the ants and are either placed on their bodies or carried away in their
mouthparts. This habit of the "ant riding" by Hippeococcus spp. is apparently
facilitated by their exceptionally long, raptorial legs and flat, suckerlike
tarsal digitules."