Metalaxyl5%GRndi mtundu wa mankhwala omwe amagwiritsidwa ntchito makamaka poletsa kukula ndi kufalikira kwa matenda a fungal ndi mildew mu mbewu. Mankhwalawa ali ndi kawopsedwe kakang'ono, ndipo ndi othandiza kwambiri popewa komanso kuchiza mitundu yambiri ya bowa. Ndiosavuta kugwiritsa ntchito ndipo imakhala ndi nthawi yayitali yotsalira, zomwe zimapangitsa kukhala chisankho chabwino kwa alimi omwe akufuna kuteteza mbewu zawo ku matenda oyamba ndi fungus.