Spray damage will leave a pattern of spots equally spaced on the leaves. ![]() This why it is always important to read the label before using any chemical.Ĭhemical damage can often be determined by leaf damage patterns. While one expects herbicides to kill plants, insecticides can also kill when used at the wrong time, temperature, or on a plant that cannot tolerate it. Chemicals can be contact, killing the part of the plant they touch, such as weed killers that top-kill only, or systemic, moving within the plant with the sap, such as soil sterilizers. It can come from sprays onto leaves, from soil into roots or occasionally from wounds in bark. You can use lime to help neutralize the acid that is created.Ĭhemical damagecan be contact or systemic. Examples of environmental disorders that may cause cultural disease are drought, temperature extremes, chemical damage, physical damage, nutrition and soil pH, and incorrect light conditions.Ĭat urine is another cause of chemical soil contamination in flowerbeds on the warm side of a house in the winter. When disease is caused by environmental factors they are considered cultural diseases. The cause of this condition may be a result of infection by disease-causing organisms, or from environmental factors. Plants are considered to be diseased when they do not grow or develop normally. There is no law that you can't have more than one problem at the same time With experience comes a knowledge of specific symptoms you can't possible know unless you have seen them (e.g. As you learn more, it is stored in retrievable memory, but you have to be able to access it and consider it. If an answer immediately comes to mind, but you wonder if it is right, pay attention to it trust your own judgment. changes in growing conditions soil added, construction, watering system installed.ĭon't be afraid of common sense and trusting your sub-conscious to tell you an answer you already know.planted by the same person some by plant owner, some by developer.plants in appropriate growing conditions for that plant. ![]()
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