Biennial ReportSuperintendent State Printing., 1902 |
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Agriculture Angeles aphids aphis apple apricot army-worm asparagus black scale blight Board of Horticulture borer California Fruit Canners canker-worm carloads cars cause cent citrus co-operation co-operative codling-moth colonies Committee convention County at large crop damage deciduous deciduous fruit destroyed destruction disease distribution districts dried fruit Eastern eggs Entomologist fact farmers favor figs flies freight Fresno Fresno County fruit industry fruit-growers grapes grasshoppers growers growth Horticultural Commissioners important inches increase infested injury interests irrigation labor lady-birds larva larvæ methods mosquitoes moths Nicaragua Canal olive orange orchardists orchards organization packing parasite peach pear pear-blight pests phylloxera Placer County plants plum pounds present prune pupa railroad raisin resolution roots Sacramento San Francisco scale insects season Secretary sections shipments soil species spraying Tehama County tion transportation trees Tulare County varieties vineyards wings winter yellow fever
Priljubljeni odlomki
Stran 127 - The damage is particularly serious in the case of nursery stock and young trees, and is less often important after the tree has once become well established and of some size. Where this insect is abundant all the roots of a young tree to the depth of a foot or so become clubbed and knotted by the growth of hard fibrous enlargements, with the result in a year or two of the dying of the rootlets and their ultimate decomposition with attendant disappearance of the galls and also of the lice, so that...
Stran 107 - The old idea that malaria is caused by breathing the miasma of swamps has been exploded. Malaria is contracted only through the bites of mosquitoes of the genus Anopheles. The cause of human malaria is the growth and development, within the...
Stran 109 - ... around in the water, returning at frequent intervals to the surface to breathe, and when at the surface hanging with simply the tip of the tail extruding, the rest of the body being held below the surface at a great angle. What we have called the "tail" is simply the breathing tube, which, with the common Culex wigglers, is long and more or less pointed.
Stran 119 - As soon as the skin is split, the soft and white fore-body and head swell and gradually extrude more and more by a series of muscular contortions ; the new head slowly emerges from the old skin, which, with its empty eyes, is worked back beneath, and the new feelers and legs are being drawn from their casings and the future wings from their sheaths.
Stran 118 - By repeatedly extracting and studying specimens in every stage of oviposition, we have been able to ascertain the exact method by which the egg-mass is formed. If we could manage to watch a female from the time the bottom of her hole is moistened by the sebific fluid, we should see the valves all brought together, when an egg would pass down the oviduct along the ventral side, and, guided by a little finger-like style, pass in between the horny valves, and issue at their tips amid the mucuous fluid...
Stran 44 - Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara...
Stran 62 - ... may be, the following are the most important: Pruning. — Pruning in winter time, or when the tree is dormant, tends to make it grow and form a great deal of new wood, and on that account it favors pear blight. Withholding the pruning knife, therefore, may not otherwise be best for the tree, but it will reduce to some extent its tendency to blight. Fertilizing. — The better a tree is fed the worse it will fare when attacked by blight. Trees highly manured with barnyard manures and other nitrogenous...
Stran 128 - On the trunks the presence of the lice sometimes results in the roughening of the bark or a granulated condition which is particularly noticeable about the collar and at the forks of branches or on the fresh growth around the scars caused by pruning, which latter is a favorite location. On the water shoots, they collect particularly in the axils of the leaves, often eventually causing them to fall ; and on the tender greener side of the stems.
Stran 161 - Do not kill any more insects than you need for your collection. The second rule is: do not breathe the fumes of the bottle; for they smell badly and are not good for you. When you uncork the bottle to put an insect in it hold it away from your face and cork it up again as quickly as possible. Some insects may be caught from flowers, etc., directly into the bottle by holding it uncorked beneath them for a moment; the fumes of the poison soon overcome them and they drop into the bottle. In taking insects...
Stran 105 - While it is true that both malaria and typhoid prevail in large cities, it is none the less true that they may with a certain degree of accuracy be termed country diseases, that is to say, rather specifically, diseases of the farm and the small village. Malaria, in fact, has been called by medical men a country disease. Swampy regions do not occur in cities, or, at all events, only in the suburbs, whereas they occur commonly in the country. Open streams with side pools of still water are found only...