Untersuchungen ueber die Umfallkrankheit der Tulpen
Some insecticides were tested in systematic trials or on a small scale, especially for ovicidal action, residual activity in relation to life cycle of red spider mite (Tetranychidae), herbicidal activity and method of application. Practical experience with them was gained with flowers under glass.Azobenzene was a good acaricide and was also herbici...