004150000a22001570004500020001500000060000800015082001600023100002100039100001800060245003800078250000600116260003100122260000900153300000800162650008700170  a090143678x  a100  a632.902 SCO  aLedieu,  Michael  aScopes, Nigel  aPest and disease control handbook  a2  aEngland, BCPC publications  c1983  a693  aField crops- Disease and pests/ Pest control- Field crops/ Plants- Disease control