CONTENTS

Distribution and Population of Papaya Carmine Spider Mites and Their Predators

Nelson M. Esguerra and Frank H. Haramoto

Host Range of Xanthomonas manihotis Starr

Ofelia I. Dedal, M.K.Palomar and C.M. Napiere

Effect of Different Methods and Timing of Weed Control on the Yield and Yield Components of Grain Sorghum

Alfredo B. Escasinas and Rodolfo G. Escalada

Factors Limiting Fruit and Seed Set in Taro

Jose R. Pardales, Jr.

Intravarietal Yield Variability of Sweet Potato

N.O. Aparra and N.G. Mamicpic

Performance of Different Mungbean Varieties Grown in the Open Field

Juanita B. Monter and Rodolfo G. Escalada

Zinc Content of Alluvials As Affected by Residual Soil from the Upper Catchment Area

Faustino P. Villamayor

Soil Factors Affecting Zinc Availability in Sonic Alluvial Soils of Leyte and Southern Leyte

Faustino P. Villamayor