. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). 692 Grasses and Leguminous Crops in New York THE clover flower-midge Dasyiiewa legumiriicola Lintner The clover-midge is generally distributed throughout New York, where it is one of the most important causes for the failure of the seed crop. It was first discovered in the vicinity of Albany in the late seventies. This pest is usually associated with the clover-seed chalcid and it is often difficult to determine which is responsible for the greater part of the damage. The parent insect is a minute, delicate
. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). 692 Grasses and Leguminous Crops in New York THE clover flower-midge Dasyiiewa legumiriicola Lintner The clover-midge is generally distributed throughout New York, where it is one of the most important causes for the failure of the seed crop. It was first discovered in the vicinity of Albany in the late seventies. This pest is usually associated with the clover-seed chalcid and it is often difficult to determine which is responsible for the greater part of the damage. The parent insect is a minute, delicate, two-winged fly about one-twelfth inch in length. The head and thorax are black and the abdomen reddish. The flies appear Fig. 663. The Clover Flower-Midge, ^^^ ^j^g ^i^^^j. f^^i^^ ^j^g^^ ^j^g Female. (Redrawn after Webster) pl^nts aro beginning to head. The female (Fig. 663) is provided with an extensile ovipositor at the tip of the abdomen by means of which she is enabled to insert her minute yellowish to orange eggs down into the flower-head, where they are glued to the hairs of the calyx tube. The eggs hatch in about three days aiid the young maggot works its way between the petals of the Unopened flower, enters the ovary, and devours its contents. The infested flower-buds remain aborted and the corolla, usually does not open. ^Miere a large proportion of the flower buds are infested the head' remains gTeen or becomes distorted. The larvae feed during June and emerge from the heads about the first of Julv. The mature maggots are about one-twentieth inch in length and white to orange in color. On leaving the heads they descend to the ground where most of them spin cocoons within which they pupate. The insect remains in the pupal state for about three weeks. The flies of the second brood are most abun- dant during the last week of July and the first half of Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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