Phytotoxicity tests with the molluscicide N-tritylmorpholine.

N-Tritylmorpholine (Frescon, WL 8008) has been applied as an emulsifiable concentrate (FX 28) to cotton and rice in glasshouse experiments without any adverse effects. The compound was applied in the irrigation water at 5 and 10 times the rates used for snail control. The experiment on cotton was terminated after 60 days, when the plants became pot-bound. The treatments did not affect the leaf area or the fresh weight of plants. The rice (Oryza sativa ssp. japonica) was harvested and no differences in growth, time of ear emergence or total plant weight were noted.A further experiment using the same formulation of N-tritylmorpholine in an overhead spray on young cotton and rice, at rates up to 48.5 kg/ha of FX 28, resulted in no adverse effects.