. Manual of vegetable-garden insects. ors and as varieties of Agromyza maura Meigen byothers. The asparagus miner belongs to this group. As thehaljits and early stages of most of these varieties or species arestill unknown and as it is very difficult to distinguish themfrom a study of the flies alone, it is at present impossible todetermine the actual range of this pest. In America Agromyzasimplex has been recorded from Massachusetts, Ontario andIllinois and southward to Georgia. It also occurs in central California. It has beenreared in France and theflies have been capturedin England and Ger
. Manual of vegetable-garden insects. ors and as varieties of Agromyza maura Meigen byothers. The asparagus miner belongs to this group. As thehaljits and early stages of most of these varieties or species arestill unknown and as it is very difficult to distinguish themfrom a study of the flies alone, it is at present impossible todetermine the actual range of this pest. In America Agromyzasimplex has been recorded from Massachusetts, Ontario andIllinois and southward to Georgia. It also occurs in central California. It has beenreared in France and theflies have been capturedin England and is apparently thesame species but deter-mined as Agromyza maurawas reared from aspara-gus in Hungary. The adult of the aspara-gus miner (Fig. 133) is asmall, metallic, black,two-winged fly, |^ to |^inch in length and having an expanse of 3- to -j inch. InNew York the flies appear from the middle to the last ofMay. In about a week after emerging, the female insertsher eggs just under the epidermis of the asparagus stalk near. Fig. 133. — The asparagus miner, adult (XS). ASPARAGUS INSECTS 209 the ground. The egg is elongate oval, slightly wider at oneend and somewhat pointed at the other. It is about 5Vinch in length and when first laid is glistening white incolor. The eggs hatch in twelve to eighteen days and theyoung maggot begins to mine just under the epidermis. Atfirst the larva works upward, following a more or less sinuatecourse, but when nearly mature it turns downward towardsthe base of the plant. In the case of the first brood, pupationmay take place aboveground but the maggots of the secondgeneration usually work down from one to seven inches belowthe surface before transforming. The full-grown maggot iscreamy white in color and is ^ to ^ inch in length. The maggotsattain their growth in two or three weeks and transform intopuparia within the mine. The puparium is ^ to ^ inch in lengthand brownish in color, becoming darker with age. The insectremains in thi
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
