. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 30 MASS. EXPERIMENT STATION BULLETIN 447 The fruitworm (Fig. 24) has taken an estimated third of the whole Cape crop in some \ ears. It may be checked by holding the winter flowage till late May or by spraying or dusting in the middle of the blossoming period and again ten days later with derris or cryolite. The black-headed fireworm (P^ig. 25A) seldom harms stricth' dry bogs much. It may be treated by flooding tor ten hours at the end of May and again a week later. Dusting with DDT or p\Tethrum or dusts
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 30 MASS. EXPERIMENT STATION BULLETIN 447 The fruitworm (Fig. 24) has taken an estimated third of the whole Cape crop in some \ ears. It may be checked by holding the winter flowage till late May or by spraying or dusting in the middle of the blossoming period and again ten days later with derris or cryolite. The black-headed fireworm (P^ig. 25A) seldom harms stricth' dry bogs much. It may be treated by flooding tor ten hours at the end of May and again a week later. Dusting with DDT or p\Tethrum or dusts containing rotenone is very effective. Small patches infested with root grubs (F"ig. 26) are treated with a solution of 7 ounces of sodium cyanide in 100 gallons of water, a gallon to a square toot (Fig. 27). This is fairly effective, but must be repeated in five years. A better treatment for large infested areas is to let the winter flowage off early in April, reflood about May 12, and hold the water till July 12. This usually cleans out grubs of <dl kinds well, but at the cost of the crop. This pest has taken 150,000 barrels a year from the Massachusetts cranberry crop for some time. The gypsy moth (Fig. 25 B) may be controlled by holding the winter flowage till May 25, by reflooding about May 25 for twenty-four hours, or by spraying with 3 pounds ot dr\ lead arsenate in 50 gallons of water about May 20. Flooding. Fig. 25. A. Webbed Cranberry Branches, work of the Black-headed Fireworm. B. GypsyiMoth Caterpillar Defoliating a Cranberry Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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