. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. Ad r^TH^OTTQ T7T?TTT'rQ TM T7_r^n A QT <^TATirc; g OQ V-^X XXVV/W-/ A AVV/AAV-/ AAl X^^ ^/ .A^^A. fl â such fruit must be classed as seconds or as culls. These insects can be poisoned by some arsenical compound or they can be picked by hand on cool mornings when they are very inactive and dropped into a pan of kerosene. 50. Bag Worm.âA common insect in the citrus groves of Florida is the bag worm. In Fig. 26 is shown the case of a bag worm suspended from a branch. The presence of this insect in the grove can always be det
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. Ad r^TH^OTTQ T7T?TTT'rQ TM T7_r^n A QT <^TATirc; g OQ V-^X XXVV/W-/ A AVV/AAV-/ AAl X^^ ^/ .A^^A. fl â such fruit must be classed as seconds or as culls. These insects can be poisoned by some arsenical compound or they can be picked by hand on cool mornings when they are very inactive and dropped into a pan of kerosene. 50. Bag Worm.âA common insect in the citrus groves of Florida is the bag worm. In Fig. 26 is shown the case of a bag worm suspended from a branch. The presence of this insect in the grove can always be detected by the peculiar shajicd cases in which the insect spends the winter. The cone-shaped cases are made of little sticks and rubbish fastened together by silken threads. The bag worms eat the leaves to some extent and sometimes scar the fruit, as illustrated in Fig. 27, but fortunately they are not usu- ally abundant enough to be worthy of notice. In case it should be necessary to resort to measures of control, they may be poisoned by the same arsenicals that are used for other biting insects. 51. Ants.âIn Southern Florida the leaf-cutting ants and in Louisiana the recently introduced Argentine ant, does damage to orange trees, the former by cutting and carrying away the leaves. These ants can be effectively controlled by trailing them to their nests and treat- ing the nests with a solution of potassium cyanide. A hole is made in the middle of the nest and into it is poured a few ounces of the solution, which consists of 1 ounce of potassium cyanide to 1 quart of water. The fumes given off will penetrate the hill and kill all the ants present. If the nest is near enough to the tree for the liquid to reach the roots it must lie used cautiously. Potassium cyanide is one of the most ])()werful ])oisons and must be handled with care. In case the nests cannot be found, the insects may be kept from the trees by banding them with some sticky tarry. Fig. 26 r>TTr) TTTO^O T1VT /
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Keywords: ., bookcentury1900, booksubjectcitrusfruits, booksubjectfruitcultur
