LAHORE : Wheat growers have been advised to be vigilant against aphid attack as the crop is in sensitive stage of growing. Chances of wheat aphid attack in March increases and suggested the growers to spray cold water where wheat aphid attack is witnessed instead of using poisons. He also urged the agriculture officials to provide necessary information to farmers. He said those growers who had not sown spring corn, spring sunflower due to some reasons they could sow spring green gram (Moong) till the end of March. He said after sowing Moong farmers could cultivate cotton and paddy as these crops grow in a short period of time and cultivation of these crops also make the land more fertile.