Control black vine weevils and other weevil species in nurseries biologically and sustainably with our products nematop® and nemamax®.

Our expert: Sabrina Sieger

I will be happy to advise you on biological pest control in nurseries.


Control weevil larvae with nematodes

The main pest in nurseries is the black vine weevil, Otiorhynchus sulcatus. In addition, other weevil species, such as O. ovatus and O. crataegi or O. armadillo, occur more frequently. With few exceptions, they are also susceptible to the beneficial nematodes in our products nematop® and nemamax®.

nemamax® contains the cold-resistant nematode species Heterohabditis downsei and is already effective when daytime soil temperatures are around 8°C. Cooler night temperatures do not harm the nematodes, they are then only inactive. The larvae and pupae of the black vine weevil are controlled, and application is possible in early spring and late fall.

nematop® contains nematodes of the species Heterohabditis bacteriophora and is effective as soon as the daytime soil temperatures are above 12 °C. The larvae and pupae of the black vine weevil are also controlled. Here, too, the larvae and pupae of the black vine weevil are controlled. Application is possible from the beginning of April to the end of May and from August to the beginning of October.

Application of nematop® and nemamax®

Application can be made by soil application, crop protection spray or drip irrigation/drip tubes.
The application rate in soil is 500,000 nematodes per square meter, in container crops 5,000 - 10,000 nematodes per liter of substrate.



Control cockchafer grubs in nurseries

An important pest in Christmas tree crops is the cockchafer (Melolontha melolontha). It is still difficult to control its grubs with nematodes. In individual trials, up to 50% of the grubs could be controlled with a nema-green® cockchafer treatment. The smaller the larvae, the better the effect.

The application of nema-green® cockchafer takes place from April to September.
The nematodes in this product work best at soil temperatures of 14 - 25° C. Ideally, the first treatment is carried out at the beginning of May, when the grubs come up from the deeper layers and are still weak. In early September, when all new grubs have hatched, the treatment is repeated.

The whole application should be carried out again the next year.