Cost Saving

The cost saving on labour and chemicals may be as much as 80 percent.

Consequently, research shows that compared to other methods, chemical control is by far the cheapest, also when including indirect costs (treatment costs drinking water companies).

Costs comparison procedures euro cent/m2/year

Method	Productivity(m2/hr))	Energy consumption(kJ/m2)	Costs indication (¤/m2)
Chemical(selectspray)	2,300-4.600	<50	0,01-0,03
Scorching	300-860	460-1830	0,03-0,07
Brushing	430-1500	120-420	0,08-0,18
Hot water	110-450	300-3000	0,17-0,68
(Source: IMAG, Wageningen, december 2002)