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Gooseberries and currants , although closely related , can easily be identified by examining the canes and fruit color ; gooseberry canes normally produce a spine at each leaf node and bear roughly grape-sized berries singly or in groups of 2 or 3 , while currant canes lack spines or prickles and bear 8 to 30 smaller fruit in clusters ( figure 1 ) . A combination of SAR images and laser altimeter data should allow measurement of flood areas and river heights , critical parameters for short-term flood assessment as well as longer term understanding . Weeds such as dandelions , plantain , and thistle are also susceptible and can serve as a source of inoculum in home gardens . IPM practices reduce non-target effects on beneficial insects and permit control decisions based on pest species and the most vulnerable stage in its life history . However , even though the status of SAR for measuring these quantities is very promising , it is recognized that there are a number of logical steps to be taken in order for the general scientific and public communities to benefit from this research . For example , 10-m horizontal resolution and 1-m accuracy for the primary DEM model would better describe the surface spacing and size of important geomorphologic features , especially hill slope variations in arid and temperate regions and river terraces .