• Gerbera

  another species from South Africa, the Gerbera viridifolia. The result is generally known as Gerbera hybrida and there are now many cultivars that differ greatly

• Loose smut of wheat

  General Ustilago nuda f.sp. tritici is a basidiomyceteous fungus that affects wheat. It is also known as loose wheat smut, or loose smut of wheat. Damage

• Loose smut of barley

  General Ustilago nuda f.sp. hordei affects barley and can destroy a large proportion of the crop. It is also known as barley smut, or loose smut of barley

• Fall Armyworm

  General The fall armyworm is a polyphagous pest that is indigenous throughout the Americas. Recently, it has been found in Africa too. The caterpillars [...] pasture grasses, millet, tomato, potato and cotton. Fall armyworm moths generally disperse in a radius of about 500 km (300 miles) before oviposition, which

• Southern blight

  General Grey rot or southern blight is a disease caused by the fungus Athelia (Sclerotium) rolfsii . It is an important plant pathogen that inhabits the [...] make a host more susceptible, but it can invade via direct penetration, generally close to the surface of the stem. In favourable conditions, the sclerotia

• Cottony cushion scale

  General The cottony cushion scale, Icerya purchasi , is considered to have originated in Australia. It was accidentally introduced to California in about [...] periodically discovered in greenhouses in temperate regions, but is not generally a pest in these situations. Damage symptoms Cottony cushion scale is a

• Root and crown rot of strawberry

  General New diseases in strawberry have been ascribed to Pestalotiopsis clavispora in the case of root and crown rot (of strawberry), first found in The

• Black sigatoka disease

  General Mycosphaerella fijiensis also known as black sigatoka, is an ascomycete fungus that causes leaf-spot of banana. Damage symptoms Black sigatoka

• Downy mildew of Cucurbits

  General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops like cucumber, cantaloupe, pumpkin, watermelon and squash

• Citrus leaf miner

  General Citrus leaf miner found in all regions where Citrus sp. is grown. Damage symptoms The minute larvae enter the leaf tissues of tender leaves and