A group of grackles is called a "plague" or a "plague of grackles".
The Bubonic Plague
They crushed rose peatals and mixed it with water.
The bubonic plague was called the Great Pestilence, Great Plague, or Great Mortality during the Middle Ages. Somewhat later it was called the Black Death. There is a link below.
(Puss filled) Boils...i think.Another answer: The swelling under people's arms were called Buboes, which is why the disease was called the Bubonic Plague.
rose called Joyce
Hydrophobia.
locusts
he created the pill to use it against the bubonic plague in the Elizabethan era. Although the formula hasn't survived it is said that the pill protected the person using it against the plague.
In Marathi, rose is called 'gulab'
Plague
The bubonic plague.