Some studies say grasshoppers can only survive for about two days without food, while other research claims that they can live five to 10 dayswithout food. Grasshoppers, although small, consume a lot of food considering their weight. They get most of the water and nutrients they need from eating grass or other plants.Click to see full answer. Also to know is, what does a grasshopper need to survive?Grasshoppers do need moisture to survive, but in most cases they will get all the water they need from the grass that you feed to them. what do grasshoppers eat? Diet. Grasshoppers aren’t particularly selective about what they eat, but they often favor green leaves. When grasses, plant stems and flowers are scarce, grasshoppers have no problem eating fungi, moss, animal dung, rotting meat, and weakened insects or spiders. Also know, how long can a grasshopper live? about two months At what temperature do grasshoppers die?The preferred temperature range is 86-112°F (30-44°C). Because grasshoppers normally produce little body heat, they thermoregulate (maintain appropriate body temperature) by using heat gained from the environment.