Proeven en waarnemingen nopens de bestrijding van de sparrebladwesp (Lygaeonematus Abietum Htg.) met chemische middelen

@article{Fransen2005ProevenEW,
  title={Proeven en waarnemingen nopens de bestrijding van de sparrebladwesp (Lygaeonematus Abietum Htg.) met chemische middelen},
  author={Dr Ir J. J. Fransen},
  journal={Tijdschrift Over Plantenziekten},
  year={2005},
  volume={55},
  pages={254-261}
}
Cyanamide is extremely toxic to larvae ofLygaeonematus abietum Htg. but, under certain conditions, the nature of which is not understood, may cause browning of the needles. This substance is therefore considered unsuitable. Sodium silicofluoride is more toxic than barium silicofluoride. The former would be a suitable and inexpensive insecticide for this… CONTINUE READING