. New elementary agriculture for rural and graded schools; an elementary text book dealing with the plants, insects, birds, weather, and animals of the farm . caterpillars of butterflies most always change to thechrysalis without spinning cocoons, or even going intothe ground or boring into plants. Cut-Worms and Army-Worms.—Every year there ismore or less damage done to young plants on the farm bycaterpillars which we call cut-worms. This name is given to them be-cause they mostalways cut off theplants near theground. A fewkinds even climbup the trunks oftrees and otherplants to do theirmischi
. New elementary agriculture for rural and graded schools; an elementary text book dealing with the plants, insects, birds, weather, and animals of the farm . caterpillars of butterflies most always change to thechrysalis without spinning cocoons, or even going intothe ground or boring into plants. Cut-Worms and Army-Worms.—Every year there ismore or less damage done to young plants on the farm bycaterpillars which we call cut-worms. This name is given to them be-cause they mostalways cut off theplants near theground. A fewkinds even climbup the trunks oftrees and otherplants to do theirmischief. Thecut-worms workat night, but inthe daytime theyhide away in theground, or understicks, clods, old boards, dried leaves, and other thingswhich may be lying around loose. They are the youngof certain gray or dull-colored moths, which also keepthemselves hidden away during the daytime. There area great many kinds of these insects in Nebraska. Someof them often appear in large numbers, and at suchtimes are called army-worms. When present in armiesthey do not always take the trouble to hide when thesun rises, but keep on feeding and moving about all. Fig. 42. Fall army-worm. HARMFUL INSECTS 93 day. We know of the genuine, fall, the alfalfa, and thewheat-head army-worms here in our own state, andthere are still others in different parts of the country. The cut-worms and army-worms have dozens of kindsof enemies among the useful insects. These most alwayskeep them so nearly killed off that they cannot do muchharm to our crops. Sometimes, however, the weatheris not just right for the friendly insects to be about intheir usual numbers, and then these harmful kinds getahead of them. When this is the case we ourselvesmust try to do something to assist in checking theirnumbers. We can use heavy rollers and other machinesto crush the worms, or we may plough furrows and digditches for them to fall into where they may be killed,and later harrow the ground to destroy the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
