Evaluation of the control efficiency of flea beetle Ophraella communa on ragweed Ambrosia artemisiifolia based on canopy imaging spectrometer technique 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 Monitoring Canopy Chlorophyll Density in Seedlings of Winter Wheat Using Imaging Spectrometer Estimation of Canopy Leaf Nitrogen Status Using Imaging Spectrometer and Digital Camera in Cotton