. Insect enemies and diseases of the tomato. i pound to 3 gallons of water, sprayedon the leaves two or three times will keep the insect partly undercontrol. As long as sweet corn is growing nearby it attracts theworms, and thus protects the tomatoes. Hand-picking is difficultfor large gardens and must be practiced almost daily for smallpatches. STAIK-BOBER. Tomato plants may sometimes be noticed to wilt down almostover night, without apparent cause. Examination of such plantsoften reveals near one of the joints of the stalk a small, round hole,the entrance to a burrow occupied by an insect. O
. Insect enemies and diseases of the tomato. i pound to 3 gallons of water, sprayedon the leaves two or three times will keep the insect partly undercontrol. As long as sweet corn is growing nearby it attracts theworms, and thus protects the tomatoes. Hand-picking is difficultfor large gardens and must be practiced almost daily for smallpatches. STAIK-BOBER. Tomato plants may sometimes be noticed to wilt down almostover night, without apparent cause. Examination of such plantsoften reveals near one of the joints of the stalk a small, round hole,the entrance to a burrow occupied by an insect. On splitting thestalk (fig. 6) a slender striped caterpillar will be disclosed. Thispest is known as the Fig. 6.—The common stalk-borer: a, typical form of moth (male) ; b, nitela form(female) ; c, young larva; d, mature larva in injured stalk; e, pupa. All some-what enlarged. Control.—The stalk-borer usually breeds in the stems of ragweedand burdock and when these are cut or hoed out during tlie grow-ing season it deserts them, often coming upon tomato and othercrops planted for human use. This points out the most effectivemethod of control—prevention by clean culture. The weeds men-tioned should not be allowed to grow in or near the tomato gardenand should be kept down during the season. When borers arefound they should be killed, as they may injure a number of plantsbefore reaching full growth. Spraying with arsenicals for otherinsects which may be present may also protect plants somewhatagainst this pest, but it is not a specific remedy. Two forms of plant-lice or aphides (fig. 7), known respectively asthe potato aphis and the spinach aphis have in recent years bec
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