[tag=DT | □]
[tag=DT | □=□]
[tag=DT | □ & □]
These general symptoms are often accompanied by other host specific symptoms . In order to be effective , they must be applied at the first sign of disease and repeated every 7-10 days . Symptoms of gray mold depend on both host and the environmental conditions . Because of this , if you have a confirmed case of Verticillium wilt ( check with your county extension office ) , remove and destroy the infected plant . At that point , caterpillars have grown to about 1 to 2 inches in length . Both temperature and humidity are important factors in the development of powdery mildew . Although one will not know exactly what one is getting with a seedling rootstock — every single seed is a genetically different individual — hardiness , anchorage and adaptability to different soil types are generally excellent . Control efforts with fungicides require reapplication every 7 to 14 days . Plants do not store at all well after this dipping regime , so it is best to treat plants about the time they would be breaking dormancy . Recall that this study area is a " best case " example for topographic data because it is a well-mapped area in the U.S. with relatively low relief . Although pear trees are generally susceptible to a number of disease and insect problems , the fact that they are relatively uncommon in the Minnesota landscape often prevents these problems from becoming severe for home gardeners . Fertilize the soil every month during late spring and summer , but mix your fertilizer half-strength . By this we mean that , within a given pixel , the position of radar scatterers has not changed to any significant degree , but the ensemble of scatterers ( i.e ., the entire ground surface within that pixel , as well as some adjacent ones ) has moved up , down , or sideways in some correlated fashion . In this respect , it differs from the three-dimensional vector measured by GPS geodesy . In this image , color-coded range change is superimposed on a radar-amplitude image to show its relation to surface topography . Excessive pruning should be avoided because it greatly reduces the crop for that year . These numbers are bound to grow as populations swell and are increa-singly concentrated along coast lines and mountain ranges , which often represent tectonically active plate boundaries zones ( Bilham , 1991 ) . North-facing slopes and sites that experience winter shade would both work well . For now , however , sanitation ( promptly removing and destroying fallen fruit and leaves ) , cultural practices designed to promote optimum tree health , and perhaps occasional physical or chemical intervention are all that is normally needed to obtain a satisfying crop in most years . Ideally , the tree should receive one inch of water from rainfall and / or irrigation every week from May through August . The main distinguishing feature between the two species is that the Japanese beetle has five tufts of white hair along both sides of the abdomen and two small dots of white hair on the tip of it . Although other leaf spot and leaf streak diseases do occur on daylilies , it is unclear whether any of these problems are caused by fungi . These structures survive winter and cause new infections in spring .