Main crops not only suffer from Beet Cyst Nematodes. There are other nematode types which effect growing of root crops and vegetables on sandy soil. Multiresistant fodder radish varieties take care of these nematodes as well as of Beet Cyst Nematodes and moreover of various crop rotation diseases. That is why nematode resistant fodder radish varieties are a perfect addition for healthy beet, potatoes or vegetable crop rotation. The two multiresistant varieties DEFENDER and CONTRA can also be used for biofumigation.

Nematode-resistant varieties are specified to reduce the beet cyst nematodes (Heterodera schachtii). With an active hatching stimulus the catch crops attract the larvae inside cysts lying in the soil to move into the roots of mustard and oil radish. Within the nematode-resistant mustard and radish varieties the nematodes are not able to develop to females: the immigrated larvae die or become male.

Depending on the degree of control, the varieties are classified according to their resistance level. Level 1 means that more than 90 per cent of all beet cyst nematodes have been reduced in official testing, varieties which have reduced these nematodes by 70 to 90 per cent are awarded a level 2 in resistance against beet cyst nematodes.

Oil radish is a very deep-rooting plant which opens up soil compaction and gives the soil a lot of organic matter. Due to this oil radish is a good protection against nitrogen leaching over winter.

Particularly for potato crop rotations, varieties have been selected for their features of controlling Potato Ringspot syndrome caused by the Tobacco rattle virus (TRV).

Because it can easily be sown, has a fast initial development and tolerates late sowing, white mustard is a popular green manuring crop. White mustard is winter-killed. The sowing period for white mustard begins later than that of oil radish. As white mustard reacts to long days with a stronger flowering tendency, it is especially important to sow low-blooming varieties when sowing early.

Growing nematode-resistant white mustard leads to a reduction of beet cyst nematodes in beet crop rotations. Because of the possibility of early sowing are late-flowering varieties better suitable for nematode control.

Avena strigosa is an old cultivated plant, described as Saia oat by J.C. von Schreber in the 18th century. It is a primitive form of oat and its gowing cycle is similar to grass. PRATEX is a selection to reduce root lesion nematodes (Pratylenchus penetrans) without multiplication of Trichodorus nematodes.

Phacelia is not related to our cultivated plants and interrupts crop-rotation diseases. As a crop grazed by bees, it is a further source of nectar during the summer times when little food is available for them.

High levels of glucosinolates in the leaves and grains make this species (brassica juncea) excellently suited to use in biofumigation to combat soil-bound diseases.