The ornamental design for a portablesprayingdevice for liquids in agriculture and horticulture, substantially as shown and described.
FIG. 1 shows a front view of a container portable on the back of a user of a portable spraying device for liquids in agriculture and horticulture embodying my new design;
FIG. 2 shows a rear view of the container as shown in FIG. 1;
FIG. 3 shows a first side view of the container as shown in FIG. 1;
FIG. 4 shows a second side view of the container as shown in FIG. 1;
FIG. 5 shows a top view of the container as shown in FIG. 1;
FIG. 6 shows a bottom view of the container as shown in FIG. 1;
FIG. 7 shows a front perspective view of the container as shown in FIG. 1; and,
FIG. 8 shows a rear perspective view of the container as shown in FIG. 1.