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.
Excessive caffeine intake (say, 10 cups of coffee per day) results in difficulty sleeping, jitteriness, and anxiety. If you keep drinking coffee, bodily adrenaline levels remain high. This means your body is in a constant state of alert. On the other hand, caffeine can be beneficial for some health problems.