Энтомология, орнитология и герпетология: текущие исследования
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Effect of Fertilization Level on the Tobacco Nutritional Quality and the Development, Nutritional Indices, Fecundity of Spodoptera litura (F.)

Junyuan Chen, Xihong Li, Yanyan Li, Dengke Wang, Yang Wang, Chuanren Li, Rubing Xu, Xiaolin Dong

Fertilization plays an important role in plant quality and can affect the biology characters of herbivorous insects indirectly. Tobacco planting was usually guided by appointed government organizations in China. A special compound fertilizer (N∶P₂O₅∶K₂O is 1∶1.2∶2.5 in ratio) was recommended to use in many tobacco planting area. An experiment with treatments of five different fertilization levels (75(A), 90(B), 105(C), 120(D) and 135(E) kg/hm²) was carried out to assess the nutritive qualities in tobacco leaves and influencing of development, nutritional indices and fecundity on the Spodoptera litura when reared on them. The results indicated that the S. lituralarvae grew faster, and had longer female longevity and greater fecundity when reared on the tobacco leaves in fertilization level group C than those fed on the leaves in other groups significantly. Then we related this to the nutrient contexts of the leaves in the fertilizer using groups. The plants with higher soluble proteins, carbohydrates and the Relative Water Contents (FMC) in group C might be the important nutrition for development and reproduction. This investigation can provide a suggestion on this fertilizer application affecting the nutritive qualities in tobacco leaves and then the development and feeding behavior of the S. liturawhich feed with these qualities tobacco leaves can be influenced, the adults fecundity were shaped subsequently.