Adds weedkiller smoke checks to hydro trays and spreading plants.

code/modules/clothing/spacesuits/rig/rig.dm

@@ -134,7 +134,7 @@
 		verbs |= /obj/item/weapon/rig/proc/toggle_chest
 
 	for(var/obj/item/piece in list(gloves,helmet,boots,chest))
-		if(!piece)
+		if(!istype(piece))
 			continue
 		piece.canremove = 0
 		piece.name = "[suit_type] [initial(piece.name)]"
@@ -145,7 +145,6 @@
 		piece.siemens_coefficient = siemens_coefficient
 		piece.permeability_coefficient = permeability_coefficient
 		piece.unacidable = unacidable
-		if(islist(species_restricted)) piece.species_restricted = species_restricted.Copy()
 		if(islist(armor)) piece.armor = armor.Copy()
 
 	update_icon(1)

code/modules/hydroponics/spreading/spreading_growth.dm

@@ -35,6 +35,11 @@
 		die_off()
 		return 0
 
+	for(var/obj/effect/effect/smoke/chem/smoke in view(1, src))
+		if(smoke.reagents.has_reagent("plantbgone"))
+			die_off()
+			return
+
 	// Handle life.
 	var/turf/simulated/T = get_turf(src)
 	if(istype(T))

code/modules/hydroponics/trays/tray.dm

@@ -105,15 +105,15 @@
 		"sodawater" =      list(  0.1,  0,   0  ),
 		"sacid" =          list( -1,    0,   0  ),
 		"pacid" =          list( -2,    0,   0  ),
-		"plantbgone" =     list( -2,    0,   0.2 ),
+		"plantbgone" =     list( -2,    0,   0.2),
 		"cryoxadone" =     list(  3,    0,   0  ),
 		"ammonia" =        list(  0.5,  0,   0  ),
 		"diethylamine" =   list(  1,    0,   0  ),
 		"nutriment" =      list(  0.5,  0.1, 0  ),
-		"radium" =         list( -1.5,  0,   0.2 ),
+		"radium" =         list( -1.5,  0,   0.2),
 		"adminordrazine" = list(  1,    1,   1  ),
 		"robustharvest" =  list(  0,    0.2, 0  ),
-		"left4zed" =       list(  0,    0,   0.2 )
+		"left4zed" =       list(  0,    0,   0.2)
 		)
 
 	// Mutagen list specifies minimum value for the mutation to take place, rather

code/modules/hydroponics/trays/tray_process.dm

@@ -1,5 +1,10 @@
 /obj/machinery/portable_atmospherics/hydroponics/process()
 
+	// Handle nearby smoke if any.
+	for(var/obj/effect/effect/smoke/chem/smoke in view(1, src))
+		if(smoke.reagents.total_volume)
+			smoke.reagents.copy_to(src, 5)
+
 	//Do this even if we're not ready for a plant cycle.
 	process_reagents()
 

code/modules/reagents/Chemistry-Reagents.dm

@@ -1855,10 +1855,7 @@ datum
 					var/obj/effect/alien/weeds/alien_weeds = O
 					alien_weeds.health -= rand(15,35) // Kills alien weeds pretty fast
 					alien_weeds.healthcheck()
-				else if(istype(O,/obj/effect/plant)) //even a small amount is enough to kill it
-					del(O)
 				else if(istype(O,/obj/effect/plant))
-					if(prob(50))
 					var/obj/effect/plant/plant = O
 					plant.die_off()
 				else if(istype(O,/obj/machinery/portable_atmospherics/hydroponics))