Snail barriers

Also in this issue:

Agricultural research planning: A dilemma

Smog damage to cotton in the San Joaquin Valley

Evaluating the profitability of brush management and oak tree thinning for range improvement

Sampling for California oakworm on landscape oaks

Growth control of Chinese elm with inhibitor sprays

Pests in the home garden

Companion plants

Field bindweed in California

Field bindweed in California

Cultural control of navel orangeworm in almond orchards

Eucalyptus out-perform other species in salty, flooded soils

Converting chaparral to grassland increases soil fertility

Studies of two parasites of olive scale, Parlatoria oleae (Colvée): I. A taxonomic analysis of parasitic Hymenoptera reared from Parlatoria oleae (Colvée)

Studies of two parasites of olive scale, Parlatoria oleae (Colvée): II. The biology of Coccophagoides utilis Doutt (Hymenoptera: Aphelinidae)

Studies of two parasites of olive scale, Parlatoria oleae (Colvée): III. The role of an autoparasitic aphelinid, Coccophagoides utilis Doutt, in the control of Parlatoria oleae (Colvée)

Studies of two parasites of olive scale, Parlatoria oleae (Colvée): IV. Biological control of Parlatoria oleae (Colvée) through the compensatory action of two introduced parasites

Studies of two parasites of olive scale, Parlatoria oleae (Colvée): V. The culture of Coccophagoides utilis Doutt, a parasite of Parlatoria oleae (Colvée)