Show SPRAY EARLY TO KILL PLANT LICE aphids may be controlled by application of nicotine aphids or plant lice which feed by sucking slicking the juices of plants may be controlled best by applications of liquid nicotine sulphate sul spray spiny when the pests first arst attack the such plant lice often ford feed on the tha undersides of the leaves causing thern them to curl after the leaves begin to curl it Is difficult to apply control measures property properly according to S sam nn C mc mci ale i campbell Cani deputy state entomologist for the Colo colorado radd agricultural college the presence of plant lice is often indicated by an unusual abundance of tints nuts on plants abany common aphids have a protective coloring similar to the foliage they feed upon consequently the casual observer may not notice nolace their presence until the plant begins to show injury because of their sucking method of feeding plant lice cannot be controlled by arseni cals or other insecticides classed as stomach poisons but they may be readily controlled by contact sprays and dusts although nicotine dusts are practical under certain conditions liquid nicotine sulphate Is generally advised advise because it can be obtained in practically every town in the state A standard spray may be prepared by dissolving one cubic inch of soap in one gallon of water and adding 1 ono no teaspoonful of 40 per cent nicotine sul sulphate the spray should d be applied thoroughly to all parts of the plant especially under the leaves A fine spray with good pressure obtains best results only those insects wet by the spray will be killed the soap increases ti the wetting or spreading properties of th solution |