. Fumigation for the citrus white fly, as adapted to Florida conditions . Ml VS1 RINCi I HI l S. 88 aeeded, another one is painted <»n each Bide of this line al bdistance i about 36 inohes for tents <»s, in both directions from the center, so that parallel lines aboutI inches long, | inch wide, and 1 fool apart can he made acrosseach longitudinal line, beginning 1 foot from the edge of the tent. Fig. 7.—Tent marked to aid in estimating dosage, in position for fumigation. (Adapted from Marlatt.) and making the lines in succession toward the center. After makinga given number of these cros
. Fumigation for the citrus white fly, as adapted to Florida conditions . Ml VS1 RINCi I HI l S. 88 aeeded, another one is painted <»n each Bide of this line al bdistance i about 36 inohes for tents <»s, in both directions from the center, so that parallel lines aboutI inches long, | inch wide, and 1 fool apart can he made acrosseach longitudinal line, beginning 1 foot from the edge of the tent. Fig. 7.—Tent marked to aid in estimating dosage, in position for fumigation. (Adapted from Marlatt.) and making the lines in succession toward the center. After makinga given number of these cross lines on each longitudinal line, thenumber in each case equal to the distance from the middle point tothe cross line is painted on with conspicuous figures. (PI. Ill, , 4, 5, and 6; PL IV, fig. 1; PI. VII, figs. 1 and 2.) If properlymarked according to these directions, the corresponding cross lineson the three parallel longitudinal lines should be marked with thesame number, as shown in figure 6. When the tent is exactly cen-tered over a tree the reading at the ground on both sides of the tentwill be the same. Ordinarily, however, when the tent is so placedthat this line passes as nearly over the center of the tree as it is 34 FUMIGATION FOR THE CITRUS WHITE FLY. possible to estimate, the readings will differ by 2 or 3 feet, oftenmore. As the tent should always be pulled lengthwise
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