This bulletin discusses the screwworm, which is a maggot that causes losses to livestock, and measures for its control. Other maggots and insects discussed include the sheep-wool maggot, the black blowfly, the green bottle fly, and the gray flesh fly.

"No one method for the control of the common mealybug can be recommended under all conditions. The remedy or remedies to be used will depend upon whether the trees are in house lots or orchards, whether few or many, and the infestation light or severe. In the case of severe infestation it will depend also upon the kind of fruit. This insect infests oranges of all varieties, grapefruit, lemons, and all other kinds of citrus fruit grown in California, causing deformity, weakening and dropping of much immature fruit, and the discoloration and weakening of the rind of the fruit maturing. This bulletin discusses the three remedies which have been widely used; namely, fumigation, spraying, and the artificial spread of insect enemies, points out the sphere of usefulness of each method, and shows, on pages 14-15, how they may be combined so as to secure complete control." -- p. 2

"Many California citrus growers have reported in recent years that they were securing lower yields of fruit per acre than in the earlier history of their industry. Complaint also has been made that an increasing proportion of the fruit of the leading commercial varieties of oranges and lemons was abnormal or 'off type' in size, form, color, smoothness of skin, or other important characteristics.... The results obtained in bud-selection experiments carried on during the past five years indicate that by top-working with buds from those having consistently good records for productiveness and quality the inferior or 'drone' trees of such varieties as Washington Navel and Valencia oranges can be made productive and profitable. This bulletin describes the methods that have been found effective and practicable in locating the desirable and undesirable trees in groves and for transforming the latter when found." -- p. 2

"Farmers' boys and others who may wish to trap moles will find in this bulletin information regarding the best kinds of traps, with directions where and how to set them, and how to prepare the skins. Moleskins may be sold to local furriers, or, if these skins are not handled by them, information regarding prices and methods of shipment may be obtained from furs houses that do business by mail.... The methods of trapping moles discussed in this bulletin are especially adapted to the Pacific Coast States, but with modifications will apply to all localities where moles are found." -- p. 2