phytocidaladj.

1934 Ann. Rep. East Malling Res. Station 1933 157 The immediate problem to be solved by this field spraying trial was whether..lime-sulphur could be used in conjunction with nicotine or with derris with satisfactory fungicidal, insecticidal and phytocidal results. [Note] This term is now being used in reference to the effect of sprays on the tree.

1936 H. Martin Sci. Princ. Plant Protection (ed. 2) vi. 110 It is convenient in describing phytocidal activity to distinguish between acute injury, characterized by the localized killing of plant tissue (necrosis) and popularly termed ‘scorch’ or ‘burn’, and chronic injury which involves deep-seated physiological changes and causes, for example, the stunting and premature drop of fruit and leaves.

1946 Nature 21 Sept. 417/2 One other point regarding phytocidal action may be mentioned. Unnecessarily heavy dressings of B.H.C. do not appear to have a hurtful action on the carrot, whereas with the Brassicæ even moderate dressings may seriously affect the stem at the point where contact is made.

1970 Weed Res. 10 367 (heading) The correlation of the phytocidal effect of 3-amino-1,2,4-triazole with the growth stage of oat plants.

1991 Mededelingen van der Faculteit Landbouwweteenschappen Universiteit Gent 56 655 (heading) Qualitative structure activity relationship studies on phytocidal action of benzimidazole derivatives.