Immunity to virus infection

Also in this issue:

An indispensable partnership

Leafhoppers transmit citrus stubborn disease to weed host

Fusarium-resistant watermelon cultivars

Using cannery wastes on forage cropland

High density apple orchards offer many advantages

Cultural practices affect alfalfa soil temperatures

Triticale shows little potential for central valleys

Leached manure—a promising soil anti-chustant

Wastewater regulations in santa ana river basin

Grape pests

Community data bank

Temperature and plant responses to paper and plastic protectors on cantaloupes