On April 28, the weather was clear and the sun was shining. Changying Dock near Dongjiang Lake was unusually lively and the helicopter roared. Some of staff mixed the green environmental pesticide under the guidance of the forestry professional and technical personnel; some put the biological drugs into the plane; some commanded and controlled the aircraft take-off and landing with intercom. When everything was ready, the plane flew off the Dongjiang Lake, sprayed the environmental pesticide over the forest, and carried out the dendrolimus punctatus controlling work. This is the first time of Zixing Forestry Bureau to scientifically prevent and control the forest pests.

It was reported that the forest pest control work around the Dongjiang Lake was carried out under the joint study of the two levels forestry departments in Chenzhou cities and counties and the helicopter was provided by one company in Zhuzhou. Before the implementation, Zixing Forestry Bureau has announced the scope of the activities and related matters through the mainstream media. The forest control area isabout 100,000 mu, mainly including pine trees and other species. The aircraft can charge 800 kg for about 2000 mu of area, need to go back and forth 50 times and completes the all control tasks within 2 days, the cost of about 15 yuan / mu. Replaced by labor control, the cost will be 200 yuan / mu and need 1 month to complete the tasks. Aircraft control can not only save material, time and other costs, but also can achieve twice the result with half the effort. It is both economic and environmental.

Due to the warm weather around Dongjiang Lake, animal and plant breed faster, especially the dendrolimus punctatus, which can breed 2-3 times a year, and is N times to multiply. The dendrolimus punctatus is a major pest of forest pests, which has a large amount of survival and a wide range of harm and known as the "pine tiger" in some areas. Once the pine damaged, they will grow slowly and die if serious.

The mountains, rivers, forests, land and lakes are community of shared life. The lifeblood of human life is the land, the lifeblood of the land is the rivers, the lifeblood of rivers is the mountains, the lifeblood of the mountains is the soil, and the lifeblood of the soil is the trees, which is an important discussion of General Secretary Xi Jinping on the construction of ecological environment. Protecting trees is to protect the mountains and rivers and the forest pests and diseases prevention and control work with aircraft is also an important measure to protect the water source.