Archive Nut, Prune and Olive Programs

California almond growers are worried--and rightfully so--about the honey bee shortage. Honey bee guru Eric Mussen, Extension apiculturist with the UC Davis Department of Entomology, said today that almond growers may not have enough bees to pollinate this year's crop of 800,000 acres. We need 1.

Alternate or biennial bearing is a phenomenon where fruit production alternates between large crops consisting of smaller, lower value fruit during an "ON" year and smaller crops consisting of larger, higher value fruit during an "OFF" year.

In 1985, H. Schneider and J. Pehrson published an article documenting a decline of Frost Nucellar navel oranges on a number of trifoliate rootstocks (H. Schneider and J.E. Pehrson, Jr. 1985. Decline of navel orange trees with trifoliate rootstocks. California Agriculture. Sept. Oct. 1985 p.

For the last few years citrus growers in the San Joaquin Valley have been nervously watching the establishment of Asian citrus psyllid in southern California and bracing themselves for the day of northward movement. That day arrived in November 2012 when two psyllids (Strathmore 16 Nov.

Avocado Trunk Cankers This has been a low rainfall year, and often with the low rainfall, cankers will seem to suddenly appear on the woody parts of the tree. There are a number of causes for the white exudate from cankers on the trunk and limbs of avocado.

SKIP TO CONTENT PRINT Guided tour of the year-round IPM programs for field, orchard, and vineyard crops. (Detailed outlinewith links to examples) Introduction (3 min) Prevention (3 min) Pest identification (4.5 min) Monitoring (5 min) Management decisions (6 min) Management methods (6.

Ah, what an intoxicating scent! If you've ever been around the winter daphne, Daphne odora, cultivar "Aureomarginata," you know that its aroma precedes it. You'll ask "What's that fragrance?" before you even see the showy pink-and-white blossoms and its green leaves edged in gold.

Dr. Arturo Calderon, Postdoctoral scholar, USDA and UC Davis has released an instructional video (in Spanish) on the use of the pressure bomb to measure grapevine leaf water potential. We hope you will find this video to be a useful training tool.  http://www.youtube.com/watch?v=83FXDi8Vkxg

Of the one millions insects so far described, 120,000 are butterflies or moths, 150,000 are flies, 400,000 are beetles, and only 3000 are walking sticks. Which are my speciality. Not too much is known about walking sticks because not many people have studied them.

View new year-round IPM program video & year-round IPM programs to protect cole crops and pistachio from agricultural pests Got pests and want to use integrated pest management? Use a year-round IPM program.