How to determine the fertility status of a soil and the nutrient needs of a crop

The macronutrients N, P and K are required in large quantities. 

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Chilean grape supplies at least 40% lower

The frost of last autumn has had big consequences on Chilean grape export. “The volume of grapes will be 40% less,” explains Jan Marc Schulz of SFI Rotterdam, who received the first Chilean grapes last week. “The demand of Chilean grapes is high and the prices are on a great level, 1.60 Euro for red grapes and about 1.45 Euro for white grapes (500 grams), but that doesn’t make up for the losses due to lower volumes for growers.” Read More

Grape Berry Moth

The larvae of this insect can cause serious damage to commercial vineyards by feeding on the blossoms and berries. Infested berries may appear shriveled with fine webbing. Damage by grape berry moth may increase mold, rots and numbers of fruit flies. While grape berry moth larvae may only damage a few berries in a cluster, it is impractical for growers to remove damaged berries and webbing from clusters. Hosts include wild and cultivated grapes. Read More

Mealy bug

Damage Mealy bug, pseudococcas maritimus, is a serious pest of both wine and juice grapes. This pest produces honeydew that makes the fruit, shoots, and foliage sticky. A black fungus, Cladosponumspp., grows on the honeydew, producing a sooty mold. Serious honeydew and sooty mold contamination will make the fruit unsuitable for processing into wine or juice. Read More