Ecological Net Protects the Fields, Technology Empowers Harvests — Yinan County Builds a Green Pest Control System for Grain-Tobacco Rotation
In midsummer, the grain-tobacco rotation area in Yinan County, Linyi City, Shandong Province, is full of vitality. A gentle breeze stirs green leaves and rippling wheat waves, with golden ears rustling like a natural melody. On this fertile land, Yinan is carefully weaving an "ecological net" for pest control, empowering agricultural production with technology and protecting crop growth through diversified green prevention measures to lay a solid foundation for harvest.
Though small, aphids pose a significant threat: sucking crop sap causes yellowing and wrinkling of leaves, weakened photosynthesis, serious impact on crop yield and quality, and even malformed wheat ears and shrivelled grains. To address this challenge, Yinan has actively explored ecological three-dimensional aphid control technologies in recent years, built a multi-level, three-dimensional green pest control system, deeply integrated ecological concepts with agricultural production, and embarked on a path of green and sustainable agricultural development.
Along the ridges of Yinan’s grain-tobacco rotation area, clusters of Cnidium monnieri grow quietly, with tiny white flowers like stars. The flowering period of Cnidium monnieri coincides precisely with the migration period of winged aphids. When in bloom, the flowers effectively attract beneficial insects such as seven-spot ladybugs — natural predators of aphids — to inhabit and reproduce, forming a natural biological defense barrier. Planting Cnidium monnieri not only improves the ecological environment of the rotation area but also achieves the ecological control effect of "raising insects with grass and controlling insects with insects", enabling Cnidium monnieri to coexist harmoniously with wheat and tobacco, forming a unique ecological pastoral scene.
The application of biological technology provides important support for ecological pest control. In the fields, sex pheromone traps, dressed in "green skirts", stand like silent "white guards" protecting the crops. These devices release specific sex pheromones to accurately attract male pests, trapping them by exploiting their instinctive reactions. This not only improves control efficiency but also reduces the use of chemical pesticides, allowing the ecological environment of the rotation area to recover. These seemingly insignificant devices play an indispensable role in ecological pest control.
In addition to biological control and technological means, Yinan has built a dual-line protection system of "attraction and repulsion" through scientific temporal and spatial layout. Sunflowers planted in stages thrive along the fields and winding paths. The wheat harvest season coincides with the phased blooming of sunflowers, whose bright golden flowers have a strong appeal to aphids, effectively diverting their attention from crops. Meanwhile, the silver-gray plastic film covering the fields reflects special spectra, which significantly repels aphids and reduces their invasion and spread. This temporal and spatial layout, which takes into account both crop growth cycles and natural laws, achieves dual internal and external prevention and control, further strengthening the ecological protection barrier.
From Cnidium monnieri attracting beneficial insects for dynamic protection, to sex pheromone traps setting "traps" with technology, and the clever coordination of sunflowers and silver-gray film for "attraction and repulsion", Yinan has formed an interlocking ecological pest control chain with green prevention technologies. It integrates ecological concepts throughout the entire agricultural production process, protecting the ecological environment of the grain-tobacco rotation area and providing solid guarantee for high crop yield and quality, steadily moving towards a green and sustainable future of modern agriculture.
