Volume 2 Issue 2 

Volume 2 Issue 2 

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Application Research Article

A Simulation Model for Predicting the Development of Cut Lily Based on Photo-Thermal Index

Yongyi Dong*, Dongsheng An

In order to provide accurate prediction of the development stages of cut lily, which is crucial for decision-making of the market schedule, a simulation model based on photo-thermal index was developed to estimate the phenophase days during greenhouse production. Three experiments of Lilium Oriental Hybrids cv. ‘Sorbonne’ with different planting date were conducted in PC multi-span greenhouse in Nanjing from March 2009 to January 2010 for data collection used to model construction and validation. The results showed the relative prediction error (rRMSE) between the observed days and the simulated days for each development stage were 1.58 d, 2.23 d, 2.54 d, 1.58 d, respectively.

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Research Article

Diallel Analysis of Southwestern Corn Borer Leaf Feeding Damage in Maize

W. Paul Williams*, Gerald A. Matthews Jr

Southwestern corn borer [Diatraea grandiosella (Dyar)] is an important pest of maize in the southern United States. It feeds extensively within the leaf whorls of plants in the vegetative stages of growth. This reduces both the quantity and quality of harvestable grain. Germplasm lines with resistance to southwestern corn borer leaf feeding have been developed and released. A diallel cross was produced by making all possible crosses among five lines selected for resistance to southwestern corn borer and five lines selected for other qualities.

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