Onion maggot

Chapman, R.A., Harris, C.R., Svec, H.J., and Robinson, J.R. Persistence and mobility of granular insecticides in an organic soil following furrow application for onion maggot control, J. Environ. Sci. Health, B19(3) 259-270, 1984. 

Other plant-feeding insects, such as the cabbage looper, have piled one resistance upon another, so that we must look to pheromones and chemosterilants for their control. The western corn rootworm has now joined the onion maggot in going OP-resistant. Resistance problems on pests of rice in Japan are becoming as severe as those on cotton in the Americas. 

Garlic is closely related to onions and prone to the same problems, especially onion maggots. See the Onion entry beginning on page 155 for more information. 

Plant yeUow and wilted. Causes Fusar-ium bulb rot onion maggots lesser bulb flies wireworms. Onions infected with Fusarium bulb rot have soft necks, and entire bulbs may be soft and brown. Destroy infected plants. Prevent problems by planting cultivars, such as Long White Summer Bunching , Northern Oak , Sentinel , and Valiant , that are somewhat resistant. 

Lesser bulb fly larvae are V2 long, wrinkled, and yellow-gray. They cause injury similar to onion maggots and are controlled the same way. 

Many of the culinary seasonings we use, like black pepper, chili pepper, dill, ginger, paprika, and red pepper, owe their hot stuff to capsaicin, a compound shown to repel insects. Researchers have found that as little as M ounce of capsaicin sprinkled around an onion plant reduced the number of onion maggot eggs laid around the plant by 75 percent, compared to untreated plants. 

Protection Offered Use capsaicin dusts to repel onion maggots and other root maggots in vegetable seedlings. Pepper dusts will help repel ants, thus controlling the aphids they protect. 

Delia anliqua. See Onion maggots Delia radicum (=Hylemya brassicae). 

Belanger, A., Mathur, S. P., and Maretl, P. (1982). The effect of fonofos and carbofuran on microbiological population and persistence of fonofos in four organic soils infested with onion maggot. J. Environ. Sci. Health 17B, 171-182. 

USE Nematocide, insecticide esp for the control of nematodes in golf courses and cemeteries. A [0% granular for -mulation is available for the control of onion maggots. 

Matsumoto, Y. A.J. Thorsteinson. 1970. Olfactory response of larvae of the onion maggot, Hylemya antiqua Meigen (Diptera Anthomyiidae) to organic sulphur compounds. Appl. Entomol. Zool. 3 107-111. 

MIL 90] Miller J.R., Cowles R.S., Stimulo-deterrent diversion a concept and its possible applieation to onion maggot control . Journal of Chemical Ecology, vol. 16, pp. 3197-3212, 1990. 

---