Among the immediate economic causes of the migration were the labor depression in the South in 1914 and 1915 and the large decrease in foreign immigration resulting from the World War. Then came the cotton boll weevil in the summers of 1915 and 1916, greatly damaging the cotton crop over considerable area, largely in Louisiana, Mississippi, Alabama, Georgia and Florida, and threatening greatly to unsettle farming conditions in the year 1917.[17] There followed then the cotton price demoralization and the low price of this product during subsequent years. The unusual floods during the summer of 1915 over large sections in practically the same States further aggravated the situation. The negroes, moreover, were generally dissatisfied because of the continued low wages which obtained in the South in spite of the increasing cost of living. Finally, there was a decided decrease in foreign immigration. The result was a great demand in the North for the labor of the negro at wages such as he had never received.[18] To understand further the situation in the South at the beginning of the migration and just prior to it, attention should be directed to the fact that the practice of mortgaging the cotton crop before it is produced made sudden reversals--an inevitable result of such misfortune as followed the boll weevil and the floods. Thousands of landlords were forced to dismiss their tenants and close the commissaries from which came the daily rations. Some planters in Alabama and Mississippi advised their tenants to leave and even assisted them. The banks and merchants refused to extend credit when cotton was no longer to be had as a security. As a consequence, a great number of tenants were left without productive work, money or credit. A host of idle persons thrown suddenly on the labor market could have no other effect than to create an excess in the cities to which they flocked, make laborers easily replaceable, and consequently reduce wages. A southern paper in commenting on this situation declared "there is nothing for this excess population to do. These people must live on the workers, making the workers poorer ... if there is a tap that will draw off the idle population, that will be a good thing for the cities at least."[19]