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If conditions for infection are present and a high level of control is desired , preventive spray programs often start as soon as rose foliage emerges in the spring and continue throughout the summer at frequent intervals ( as frequently as every 7 to 10 days in wet weather ) . A heart problem was later detected . Although the abuses of urban renewal as " Negro removal " in central cities have been widely documented , events in Freeport illustrate that the practice was not confined to cities . And others yesterday were named as possible suspects , including the militants of Islamic Jihad , one of Israel 's principal tormentors . " Contraception and condoms Can Pope Benedict XVl keep the lid on the long-running debates over whether artificial birth control is permissible and whether condoms may be used ? But protests yesterday were minimal , comprising around 100 Muslim activists and Turkish nationalists in the centre of Ankara . Recent research work has shown that when a tree produces callus rapidly , the extent of the natural discoloration of the wood in the trunk above and below a wound is less than when callusing is poor .