658 EXPERIMENT STATION RECORD. 



On young trees it should not be put on until neeessary or kept on longer 

 than required, so that the bark may develop normally. On old trees 

 it is said to make little difference when the application is made. 



The striped cucumber beetle, F. H. Chittenden {('. S. Dept. 

 Agr., Division of Entomology Girc.31, 2. ser., pp. 7, figs. 2). — This is a 

 popular circular giving general appearances and nature of attack of 

 the striped cucumber beetle, its food plants, life history and habits, and 

 remedies for it. The injury is due to the "direct attack by the beetles 

 to the plant above ground; indirectly to the beetles as transmitters of 

 disease germs; and to the larvae working upon the roots underground." 

 The larvae are thought to be restricted to cucurbitaeeous plants but 

 the beetles feed on many cultivated plants such as beans, peas, apple 

 blossoms, ripe apples; the leaves, silk, pollen, and unripe kernels of 

 corn, and on such wild plants as golden-rod, aster, the flowers of choke 

 cherry, jnneberry, cherry, and other rosaceous plants; the stamens, 

 pistils, and ray flowers of sunflowers, and probably other composites. 

 The wild cucumber (Echinocystis lobata) is not only attacked by the 

 beetles but is probably also a larval food plant. Among the remedies 

 noted are covering the young plants, early planting, clean culture, stim- 

 ulating growth, the use of trap plants, slaked lime, arsenites with ashes, 

 dust, or plaster, land plaster saturated with kerosene or turpentine, etc. 



Three injurious insects, A. L. Quaintance (Florida Sta. Bui. 45, 

 pp. 53-74, pis. 3). — The author describes the bean-leaf roller (Eudamus 

 protcus), the corn delphax (Belaphax maid is) and the cauua-leaf roller 

 (Hydrocampa ca nn alls ) . 



The bean-leaf roller has been quite destructive to beans throughout 

 the State. The larvae feed upon the leaves, eating holes in them or 

 feeding upon their edges. Descriptions are given of the different 

 stages in the life history of this insect and observations are given on 

 some of the facts established in studying its life cycle. The larva' 

 were easily bred in the insectary and invariably pupated within a 

 folded leaflet or several leaflets fastened together. The author states 

 that notwithstanding the fact that diligent search has been made he 

 has been unable to find a single pupa in the field and he suspects that 

 this state may possibly be passed in the soil. Considering the life 

 cycle as averaging about 30 days, 8 or 9 broods of this insect would 

 occur during the year, since they appear early in March and at the 

 latitude of the station continue breeding usually through December. 

 The different broods are not distinct as eggs, young and old larvae, and 

 adults are found in considerable abundance by early summer. In the 

 more southern parts of the State it is believed that the breeding is 

 continuous throughout the year. Both the larvae and adults move 

 about freely at all times of the day. The use of Paris green in the 

 proportion of 1 lb. to 150 gal. of water, to which is added 1 lb. of quick- 

 lime has proved very efficient in treating for this insect and this insec- 

 ticide does not destroy the foliage of the plant. 



The corn delphax has been observed in several localities in the South 



