Meeting challenges of the 1990s in agriculture and natural resources

Also in this issue:

Determinants of host selection for species of Aphytis (Hymenoptera: Aphelinidae), parasites of diaspine scales

Biological control sought for ash whitefly

Harvesting eucalyptus for fuel chips

Distribution of peach twig borer damage in peaches

Walnut dehydrators vary in performance

Sweet sorghum cuItivars for alcohol production

Clogging of buried drip irrigation systems

Treatment timing defined for Egyptian alfalfa weevil in the high desert

Parasitoid helps control fruit worm in Sacramento Valley processing tomatoes

Immigration reform and California agriculture a year later

Stable fly and house fly breeding sites on dairies

Cultural management of bluetongue virus vectors