. De plus en plus de fraise. Les fraises. Les insectes, les maladies et le gel 273 Carolina. Parfois, il provoque une perte de cinquante pour cent de la récolte. Les fleurs sont blessés au début surtout, de sorte que la pénurie est surtout au début des fruits, qui réunit les plus hauts prix. Les coléoptères adultes hibernent pendant l'hiver et apparaissent dans la paille - berry champ dès que le earUest bourgeons fleurs show. Ils continuent à apparaître en grand nombre, pendant un mois. Le charançon est environ un dixième d'un pouce de long, noir à brun rouge, avec une grande tache noire sur chaque aile couvercle (Fig. 19). La plupart des dommages sont causés par la femme weevi

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. Strawberry-growing. Strawberries. Insects, Diseases and Frost 273 Carolina. Sometimes it causes a loss of fifty per cent of the crop. Early blossoms are injured chiefly, so that the shortage is mostly in early fruit, which brings the highest prices. The adult beetles hibernate over winter and appear in the straw- berry field as soon as the earUest blossom buds show. They con- tinue to emerge in great numbers for a month. The weevil is about one-tenth of an inch long, black to reddish brown, with a large black spot on each wing cover (Fig. 19). Most of the damage is caused by the female weevil, which lays an egg in the bud, then girdles the stem below it. The lava feeds within the bud; in three or four weeks it pupates and emerges as a full grown weevil. The new generation of weevils feeds for a short time on the pollen of various kinds of flowers, in- cluding the strawberry, then disappears. °' 19-"Adult Control measures are limited mainly to preven- tion. Since the larva feeds mainly on pollen, the most effective measure is to grow pistillate varieties and use only enough plants of staminate sorts to pollinate them. The susceptibility of varieties is in direct ratio to the amount of pollen they produce. Staminate varieties which blossom early and profusely may be used as a trap crop and are plowed under after the weevils have congregated upon them. Many growers rely entirely upon profuse-blooming stami- nate varieties for protection — those that produce enough blossoms to bear good crops even though attacked by the weevil. In the home garden, covering the plants closely with muslin before they bloom will protect them. The attacks of this insect are so sporadic that most growers find it impracticable to spray. All trash and weeds in and around the field should be destroyed. Use mulch only when absolutely necessary, as the weevils hibernate beneath it. Leaf-roller (Ancylis comptana). This is a pest in the Northern states and Canada, from Colorado eastward.

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