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STUDY ON REGULARITY OF OUTBREAK AND CONTROL IN GREY SPECK DISEASE OF SOYBEAN A PRELIMINARY STUDY ON THE OCCURRENCE REGULARITY OF THE DISEASE ON MYTILARIA LAOSENSIS CAUSED BY GALL MITE AND ITS CONTROL Study on Red Spot Disease of Peony Tree Studies on the Incidence and Controlling Method of Dried-up Die-back of Loblolly Pine Survey and Study on Occurrence Regularity of Persimmon Fruits Disorder Top Rot Disease Population dynamics of the major damage generations of Nilaparvata lugens in single cropping medium rice area of Sandu, Guizhou Province Biological characteristics and occurrence regularity of Phassus excrescens Bulter