Show h Kill Killu I it Cabbage a a ge Worm orm I by Poison of son Sprays I Arsenic May T Also Be Ap A- plied in Dust Form Prepared by the United State Department m. m or of Agriculture Th The common cabbage worm the ba most destructive Insect enemy of cub cab bags e and related crops is best con COil t trolled by spraying ing with lead head arsenate or calcium arsenate sa says the United States Mates Department of ot A Agriculture g rl e in a p publication Just Issued entitled Th The e Common Common Cabbage Worm Vonn and I Its s Con Con- This pest is a n vel velvety green ety reen caterpillar about one and quarter one-quarter Inches In len length th and Is IR the larva lorva of ot a white butterfly known to most farmers The worm would cause much heavier losses according to the bulletin but buta for a n number of or natural enemies among the most important being certaIn tain tales wasp-like wasp parasites or four- four w winged ed flies the Immature forms of or which feed within the hod body of or the caterpillar Earl Early in the season the worm attacks attacks at at- tacks the cabbage riddling the outer leaves as the they form frequently feedIng feeding feed- feed Ing within the immature heads which are rendered unfit for food Sometimes Sometimes Some Some- times it cuts out the bud from the young oung plant thus preventing development development development develop develop- ment of the head Arsenic poisons ma may be applied In dust form rather than as ns a spray spra by mixing the powder ponder with h hydrated or alN slaked air lime land plaster dustin dusting sulphur or cheap light finel finely pulverized pulverized pul material which will adhere to the cabbage lea leaves s. s Although dusts are more easily and ond quickly applied than sprays the they do not alwa always s 's distribute distribute dis dis- tribute the poison polson as evenly and unless unless unless un un- un- un less the dusting lusting Is done when the plants are wet they do not stick as well Farmers' Farmers Bulletin F 1401 containing containing contain contain- ing a description of ot the common cabbage cabbage cab cab- bage e worm together with information relative to control measures necessary necessary sar sary materials and equipment mn may bo be obtained free while the time supply lasts from the United States Department of Agriculture Washington D. D C. C |