The side effects of the various preventive and control measures of pests and diseases of crops include the following except

The option that is excluded from the list of side effects of various preventive and control measures of pests and diseases of crops is "improved quality of farm produce." Explanation: The other options listed - environmental pollution, poisoning of wildlife, and disruption of the ecosystem - are potential negative effects of using certain pest and disease control measures such as synthetic pesticides and herbicides. While these measures can effectively control pests and diseases, they can also harm the environment and non-target organisms. Improved quality of farm produce is not a negative side effect, but rather a desired outcome of using these measures. For example, using disease-resistant crop varieties can lead to improved quality and yield of the crop.