In winter, ladybugs overwinter between wheat and rape roots, and some overwinter in sunny clods and soil cracks. In spring, once the temperature rises above 10℃, the overwintering ladybug wakes up and begins to move, which can be seen in wheat and rape plants.
In summer, with the increase of temperature and food, ladybug septempunctata proliferates. All plants parasitized by aphids and scale insects, such as cotton, willow, locust tree, elm, beans and other plants, can find ladybugs, and sometimes even gather in large numbers.
Extended data:
The food intake of ladybug is related to temperature and prey density. Taking aphids as an example, when the prey density is low, the prey quantity increases exponentially with the increase of density; When the density is high, the predation is close to the limit level. Under the condition of high temperature, the activity ability of ladybugs and their prey is affected, and the predation rate is improved.
According to statistics, the average daily food intake of Coccinella septempunctata on Myzus persicae is 1 age 10.7, 33.7 for the second age, 60.5 for the third age, 24.5 for the fourth age 130.8 for the adult. Ladybug septempunctata can eat tens of thousands of aphids in its life span of nearly 80 days. The poisonous ladybug is harmless to human beings, livestock and natural enemies, with no residue and no pollution to the environment.