A list of the pest problems under study by the Urban Biological Control project, University of California, Berkeley, California, 1977 and requests for pest management advice from cities participating in the program during 1976.
| Pest Species | Importance | |
|---|---|---|
| Total | % | |
| Phryganidia callfornica, California oakmoth | 575 | 46.0 |
| Hyphantria cunea, Fall webworm | 123 | 9.8 |
| Pyrrhalta luteola, Elm leaf beetle | 98 | 7.8 |
| Drepanaphis acerifolii, Silver maple aphid | 72 | 5.8 |
| lllinoia liriodendri, Tulip tree aphid | 65 | 5.2 |
| Archips argyrospilus, Fruit tree leaf roller | 57 | 4.6 |
| Lithophane attenata, Green fruit worm | ||
| Prociphilus fraxinfolíí, Modesto ash aphid | 38 | 3.0 |
| Euceraphis punctipennis and | 23 | 1.8 |
| Callipterinella calliptera, Birch aphids | ||
| Schizura concinna, Red-hump caterpillar | 23 | 1.8 |
| Myzocallis sp., Tuberculoides sp. and | 18 | 14 |
| Tuberculaius sp. Oak aphids | ||
| Orgyia vetusta, White faced tussock moth | 17 | 1.4 |
| Hyalopterus pruni, Plum aphid | 14 | 1.1 |
| Gossyparia spuria, European elm scale | 12 | 1.0 |
| Malacosoma sp., Tent caterpillar | 11 | .9 |
| Periphyllus lyropictus, Norway maple aphid | 10 | .8 |
| Eucallipterus tiliae, Linden aphid | 10 | .8 |
| Tropidosteptes illitus, Ash bug | 10 | .8 |
| Saissetia oleae, Black scale | 8 | .6 |
| Leptocorris rubrolineatus, Western box elder bug | 7 | .6 |
| Scolytus rugulosis, Shot hole borer | 5 | .4 |
| Tinocallis platani, Elm aphid | 5 | .4 |
| ?, Hackberry aphid | 4 | .3 |
| Trialeurodes sp., Whiteflies | 4 | .3 |
| Calico sp., Sweetgum scale | 3 | .2 |
| Hordnia circellata, Blue-Green sharpshooter | 3 | .2 |
| Muscellaneous aphids | 21 | 1.7 |