. Annual report of the North Carolina Agricultural Experiment Station. S^S ^e ^me younS cabbage ik / \ i eS&s on their stems or on18c£ 4 \ fe (/ the soil close by. The mag- gots feed on the outeriJT^. £ T roots, or stems when the te^ i • •S^VfiM* /^ CU latter is not too tough and mM^J^i W hard. Fig. 15.—Cabbage Maggot: a, larva; b, pupa; c, adult. The presence of mag- gots is indicated by wilt-ing and drooping leaves, and a general weakened appearance of theplants. It is said that plants infested when young will surely die,unless some good remedial measure is applied. REMEDIES AND PREVENTIO
. Annual report of the North Carolina Agricultural Experiment Station. S^S ^e ^me younS cabbage ik / \ i eS&s on their stems or on18c£ 4 \ fe (/ the soil close by. The mag- gots feed on the outeriJT^. £ T roots, or stems when the te^ i • •S^VfiM* /^ CU latter is not too tough and mM^J^i W hard. Fig. 15.—Cabbage Maggot: a, larva; b, pupa; c, adult. The presence of mag- gots is indicated by wilt-ing and drooping leaves, and a general weakened appearance of theplants. It is said that plants infested when young will surely die,unless some good remedial measure is applied. REMEDIES AND PREVENTION. Tobacco dust applied liberally about the plants when first set outis of some benefit as a repellent. Carbolic acid emulsion as recommended against the onion maggot,p. 47, may be used as a repellent. Quick Acting Fertilizer.—Concerning the use of fertilizers says: A combination recommended consists of: Nitrate of Soda 700 lbs. Acid Phosphate 1,000 lbs. Muriate of Potash 300 »N. J. Sta. Bui., 200. SOME INSECT ENEMIES OF GARDEN CROPS. 20 The practice of plowing away from onion rows when infestationwas noted and applying the above combination, or even nitrate ofsoda alone, has been followed with good results in CumberlandCounty, but has failed on heavier soils where the fertilizer did notget so quickly through the soil, and into direct contact with theplants and maggots. Both the nitrate of soda and the muriate haveinsecticidal qualities, but the acid phosphate has none. Manure andorganic fertilizers should be avoided, if possible, as the group of in-sects to which these root maggots belong are naturally feeders indecaying matter, and hence such conditions tend to invite them. Prevention.—Pull up and burn or otherwise completely destroyall stumps of plants, of whatever crop may have been attacked bymaggots. Practice rotation of crops, for the parent insects do notfly very far. The cabbage maggot will breed in wild cruciferousplants, including some com
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