Hi Edossa,

Unfortunately this scale is extremely dangerous for mango. You can fight it with biological control using the parasitoid Aphytis mytilaspidis or the predator Chilocorus nigrita.

You can also prune trees in the post-harvest to reduce the incidence of A. tubercularis.

I hope this helps.

Cheers!

Alessio

Pruning in combination with systemic insecticides gives good results. Please read

Belay Habtegebriel, Dawit Melisie, Hunde Kidane, Teshale Daba & Ferdu Azerefegn. 2020. Control of the white mango scale Aulacaspis tubercularis (Hemiptera: Sternorrhyncha: Diaspididae) with systemic soil drenching insecticides and pruning in greater than ten years old mangos in western Ethiopia. Israel Journal of Entomology 50 (1): 65–73. http://doi.org/10.5281/zenodo.3987792

White Mango Scale is a boring sucking insect which inserts bundles of its styllets into the plant through soft plant parts viz. fruit, leaf, young twigs and stems of young seedlings to suck sap. It is highly fecund and easily dispersed insect. Coming to the point of control, the safest and environmentally friendly approach is biological control (refer to Daneel and Joubert, 2009 ; Ofgaa et al., 2017 ). The less recommendable but the most effective approach is chemical control. The later method is even less dependable in Ethiopia, mainly because, the Ethiopian mangoes very tall and bushy. As a result it may be difficult to easily reach the pest on fruits and leaves within the indigenous mangoes (more precisely the mango land-race) with dense foliage and interlocked branches. Regards,