湘北烟区烟青虫为害损失及防治指标研究

A Study on the Damage and Control Index of Heliothis assulta Quenée in the Tobacco-growing Area of Northern Hunan

本研究在测定烟青虫食叶量的基础上,通过大田笼罩接虫试验,得出了湘北烟区第一代烟青虫为害烟草的直接和间接损失,并由此计算出第一代烟青虫为害的经济价值和防治指标。

On the basis of examination in the quantity of leaves eaten by larvae through the caged-tobacco-budworm experiment in the field, we have obtained the direct and indirect damage caused by tobacco budworm Heliothis assulta Quenee of the first generation in the tobacco-growing area of northern Hunan. After which the economic threshold of the damage and control index of tobacco budworms of the first generation are worked out.