Leaf spot is a very common disease that affects irises in our area. It can affect bulbous and rhizomatatous types of irises, but is most often a problem on bearded irises. Leaf spot is caused by the fungus Mycosphaerella macrospora, which was formerly known as Didymellina macrospora.
A few cups of coffee throughout the day can make a real difference. Some studies have found that caffeine can boost concentration for people with ADHD. Since itâs a stimulant drug, it mimics some of the effects of stronger stimulants used to treat ADHD, such as amphetamine medications.However, caffeine alone is less effective than prescription medications.educed Blood Flow to the Brain. Caffeine is also a vasoconstrictor. That means it makes blood vessels smaller and reduces blood flow. This reduced blood flow is why caffeine helps headaches. Amphetamine medications used to treat ADHD also make blood vessels smaller.
For guidance, in a cup of coffee (5 US fluid ounces) there is 85 mg of caffeine for ground coffee, 60 mg for instant and 3 mg for decaffeinated. In the same sized cup of tea there is 30 mg. Colaâs have 18 mg per 6 US fluid ounce serving. A can of Red Bull contains 80 mg. As a comparison, many of the studies reference in this article used 250 mg of caffeine, the equivalent to 3 cups of fresh coffee. It is likely that trying to replace large doses of ADHD medication with similar large doses of caffeine is likely to produce undesirable side effects.