Show lice inflict heavy damage on cattle DDT treatment guts high winter losses lice are injurious to all types ol 01 cattle animals produce less meat and milk it if lice are unchecked young animals and poorly nour dished old animals suffer most from lice the winter season Is the time lice are bad on cattle the louse tion builds up then dr harold gunderson extension entomologist at iowa state college says one louse unchecked in tall fall means 1000 1 the following march for lice control on cattle DDT Is being used successfully early in fan fall before cold weather arrives it is mixed ced with water and sprayed on the animals after cold weather comes a DDT dust is recommended farmers are being advised to use a dust containing 10 per cent DDT some of the powdered louse killers on the market contain less than 10 per cent DDT but have other ef insecticides combined with the DDT the rotenone dusts recommended for cattle grub control can be used for lice control usually they are diluted for lice to cover greater area and reduce the cost for in stance one pound of a cattle grub dust containing 1 per cent rote none can be mixed with two pounds of flour to make an effective louse killer world s largest potato yard found in chicago the world s largest potato yard is located not in idaho nor in maine but in the largest city near the geographical center of the nation chicago in the wood street yards of the milago and northwestern railroad ax Z 1 I 4 1 1 an average of 20 carloads of po are handled annually many thousands of tons of other legeta bles also pass through this yard the yard I 1 is s the central market ing point for potatoes which come in from virtually every state in the union dealers and brokers assem assern ble in the yard each day before dawn to buy sell or an average of 36 bushels daily the wood street yard is a far cry from the wooden platform which served as a terminal years ago milk testing traced to michigan farmers by louis sellers forty years ago a few progressive dairy farmers in michigan organ iced the first cow testing association in the united states they wanted to improve the profitableness of their herds they hired a tester to weigh t T A 49 part of the increase in production can be credited to progressive michigan dairy farmers and test the hlll 1 of each cow and to keep a record of her feed cost and income they wanted that inform tion lion so they could cull the low pr pro 0 dubers from their herds and feed the rest more inore economically in the first four years of their pio plo neer effort these michigan farmers doubled ou led the average profit per cow since then thousands of other dairy farmers have followed their exam pie with equally striking results new chemical utilized for grasshopper poison research men at various state colleges after trying benzene chloride a chemical du discovered covered in europe and brought to this country tor for experimental use as a grass hopper poison believe it is the best thing yet discovered for hog mange as well as grasshopper control the compound is a powder that can be used as either a spray or dip tor for hogs and is sold under various trade names |