The University of California Master Gardeners of Butte County announced on April 1 that fire blight, a bacterial disease affecting pears, apples, quince, and related plants, has appeared earlier than usual in the region due to an early dry spell. The organization provided guidance for identifying and managing the disease and shared details about upcoming workshops and community events.
Fire blight can cause significant damage to fruit trees by blackening flowers, shoots, or leaves before progressing into twigs and branches. The infection is often recognized by dead leaves and fruit clinging to scorched-looking branches. If left untreated, the disease may kill susceptible trees or cause extensive branch dieback. Early detection is important; gardeners are encouraged to monitor their trees regularly for signs of infection.
Proper pruning techniques are essential for controlling fire blight. Infected wood should be removed well below the visible infection during summer or winter when bacteria are less active. Pruning shears should be disinfected after each cut using a bleach solution. For infections on major limbs or trunks, scraping away affected bark down to healthy tissue may save the wood if done in winter while bacteria are dormant.
The Master Gardeners recommend selecting less susceptible tree varieties when planting new orchards but note that most pear varieties remain vulnerable to fire blight. More information can be found in the UC Pest Note on Fire Blight available through their resources.
Several educational opportunities were also announced: a workshop on grafting fruit trees will take place April 9, focusing on budding techniques for increasing survival rates and resistance; Seasonal Garden Talks will occur at Chapman Park Teaching Garden in Chico on April 11 with sessions covering summer vegetable planting and growing tomatoes; a plant sale featuring locally propagated plants suited for regional conditions is scheduled for May 16 at Patrick Ranch in Durham.
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Residents seeking advice about gardening issues can contact UC Master Gardeners through their hotline or visit their office during posted hours.
