Evaluation of the control efficiency of flea beetle Ophraella communa on ragweed Ambrosia artemisiifolia based on canopy imaging spectrometer technique Monitoring Leaf Phosphorus Nutrition Based on Canopy Spectrum of Jincheng Orange [Citrus Sinensis(L.)] Physiological races identification of powdery mildew on main cucurbits in Heilongjiang Province during 2009-2010 Improvement of detection method for two main viruses in sweet cherry by RT-PCR The selectivity of Diaphorina citri to Carmona microphylla and Rutaceae hosts, and its tolerance to starvation and thirstiness Quantitative analysis of differential proteins between the susceptible and resistant Trichoplusia ni cells to Bt Cry1Ac toxin