ul: the faers withinhis area are ung fertilirs. and that cnot be avoed because ofconomical atus. they have tomprove the rvest evy season th: theris a l of gap beeen the chnologyhat is avlable inhe big fms and whathe smallcale farrs are doing. and also the kind of advisory they get. because even when he has a problem with his potatoes, he just goes to the chemical store and he says, i have this problem. but they don't get to get an advice from the other methods that could be used that are more sustainable. reporter: kamau mbogo's organization promotes sustainable pest control. kamau: youse a good pest -- you can say a friendly pest, to ed on the bad pests thatre eding on yr crop. and this is a technology that is used in the cut ower. they have perfected it. reporter: that's nothing new for him.efore any sticides we avaible herethe farms used a species of ant to eradicate cropests. but it's also true that the insecticide they use now is highly efficient -- even if it is expensive. back at la naivasha,he day's catch already oits way to market -- which these days, is several kilomete