January Pest Control Checklist for the San Joaquin Valley

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If you haven’t subscribed to the University of California’s Integrated Pest Management regional online checklist tool, now is a great time to make a New Year’s resolution to take advantage of this free and timely monthly reminder. .

Go to bit.ly/3nLyAzw for the Seasonal Landscape IPM Checklist / UC IPM: Home, Garden, Lawn, and Landscape (ucanr.edu), check the box for the region you’re considering, and add your email address to their subscription feature. Peasy easy! Monthly reminders will follow.

They also have a “printable” formatting tab, which is an easy way to print and keep handy in a binder. The online version is also hyperlinked to fact sheets published by the University of California, making it easier to find and find more information.

From the January checklist, “Northern San Joaquin Valley”:

Abiotic disorders: Or disorders caused by non-living factors, such as winter frost injury, summer drought, wind damage, chemical damage, over or under watering, etc. “Preventing or Managing Damage”.

Asian citrus psyllid: Inspect your citrus fruits for Guidelines for the management of Asian citrus psyllid and Huanglongbing disease — UC IPM (ucanr.edu) “Look for it and if found where it is not known, report it,” 1-800-491-1899, “and (any) other new or exotic pests to your local agriculture commissioner. local county.” A good video to watch explaining how to find the insect is “Asian citrus psyllid detection:” youtube.be/QhQXL4bwnXI

Compost: “Turn it over and keep it moist. Cover in rainy weather if necessary to prevent softening. While you’re at it, cover any piles of soil you may have around your garden to prevent erosion.

Dormant controls: Pests in Gardens and Landscapes: Controls of Dormant Season or Delayed Dormancy – UC IPM (ucanr.edu) “Continue disease, earwig, snail and slug and weed prevention during the rainy season. Implement disease and insect control for apple, pear, stone fruit, nut trees and deciduous landscape trees and shrubs such as roses.

Clean up mummies and old fruit in and under trees.

Remove dead leaves under deciduous fruit trees and roses.

Prune dead, diseased and borer-infested wood.

Gel: Pay attention to temperatures and “protect sensitive plants from cold damage when frost or frost is forecast.” Lightweight spun polyester row cover works well on leafy winter vegetables or other sensitive plants.

Irrigation: All irrigation water should be turned off. “Adjust watering schedules based on weather and changing plant water needs. Reduce irrigation frequency or turn off systems if rainfall is adequate. The rainfall was sufficient!

Mistletoe: Gui — UC IPM (ucanr.edu) “Mistletoes are parasitic plants that absorb both water and nutrients from a host tree. Healthy trees can tolerate a few branches infected with mistletoe. However, if the infestation is severe, the trees may weaken, have stunted growth or dead branches, or die completely. Prune infected branches.

Olive knot and oleander gall, or knot: Avoid pruning olive and oleander trees in wet weather if stem galls are a problem.

Peach Leaf Loop: “Apply preventative spray one or more times in late fall until bud break if leaf curl has been a problem on nectarine or peach.” Spraying once around Thanksgiving and again right after New Years is a good rule of thumb.

Pine bark beetles, pitch moths, western gall rust and wood borers: “If the pines need branching, prune them from October to January.”

Plant deciduous trees, shrubs and bare root vines, for example: Landscape Trees, Shrubs and Perennial Vines – The California Garden Web (ucanr.edu) “cranberries, fruits and nuts, grapes and roses. Plant cedar, fir, pine and spruce seedlings. Select species and cultivars well adapted to the local site.

Prune deciduous trees and shrubs: Pests in Gardens and Landscapes: Pruning Fruit and Shade Trees and Shrubs – UC IPM (ucanr.edu) “Such as apple, crape myrtle, pear, rose, spirea, and stone fruits. Make cuts properly to encourage good form and structure. Remove dead, diseased, and borer-infested wood. Some pests (e.g. shothole borer) and host plants such as apricot and cherry warrant summer pruning.

Root rot: “Phytophthora cinnamomi and other Phytophthora spp. commonly cause diseases also known as crown rot, butt rot and phytophthora root rot. These fungus-like water molds (oomycetes) affect many plant species. Phytophthora ramorum infects aerial parts of plants and causes sudden oak death and Ramorum blight. “Favored by excess water and poor drainage. Avoid over-irrigation and waterlogged soils.

Sycamore Scale: “Sycamore Scale, Sycamore Scale Management Guidelines – UC IPM (ucanr.edu), … is the most damaging insect pest of these trees in California.

If you have any questions about gardening, contact the Master Gardeners at (209) 953-6112 or visit our website at ucanr.edu/sjmg.

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