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Fungicides help protect plants from disease ; however , they are not very effective at " curing " a problem once it has started . Flowers often fail to develop color , remain green and distorted , and seeds or fruit never develop . To pick an apple , gently take the fruit in the palm of your hand , then lift and twist in a single motion . A number of experiments using sensors mounted in trucks , aircraft , and spacecraft have shown that the moisture within a thin layer of soil , on the order of 5 cm , can be accurately measured for bare soil and thinly vegetated surfaces . They can also provide scientists with before-and-after images of peak discharge events in stream geometry to help define those changes and the stability of those changes over periods of several years after peak discharge . It will also help to solve the problem of nonunique-ness , inherent in estimating a three-dimensional displacement field from two-dimensional surface measurements . If a young branch is well placed , but has a narrow branch angle , the use of a device called a " spreader " may help . However , if growth is less rapid and rains are less frequent , spraying at 7 to 10 day intervals is usually sufficient . Remove and dispose of any infected plant parts being careful to not drop the sclerotia . Even marine seismic zones may be indirectly observable with the SAR technique , in the sense that geodetic observations in coastal regions experiencing seismic-cycle strain accumulation and release may help us understand subduction-zone earthquake processes .