Zvishandiso zvinofanirwa kushandiswa kune imwe neimwe chikamu cheguruva mask chinofanirwa kuenderana nezvinodiwa zvinotsanangurwa muzvinyorwa zvinotevera.
Yakasiyana-siyana pateniEco-ushamwari uye isina-sterile.Yakagadziriswa uye kuchengetedzwa kwezvakatipoteredza.