Nsalu zapamwamba zobiriwira zobiriwira zimagwiritsidwa ntchito kuthandizira mipanda ndipo zowotcherera pamtengo zimatha kupereka mphamvu zambiri zogwirira dziko lapansi.
Zipilala kapena ma nubs omwe ali pamtengowo adapangidwa mwapadera kuti mawaya a mpanda asagwere mmwamba ndi pansi.Chifukwa cha kulimba kwake komanso kulimba kwake, imagwiritsidwa ntchito kwambiri ku USA.