. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. i-n . 1 38 their winter hiding places about the end of May and feed at once upoc the earliest appearing potato plants; soon after this the females lay thcii bright orange colored eggs on the under side of the leaves in batches ol various numbers up to fifty or more. The grubs hatch out in about i week and set to work to devour the foliage; their dark orange coloi renders them somewhat conspicuous, so that an attack can hardly fai to be noticed. When fully grown the insect changes to the pupal sta
. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. i-n . 1 38 their winter hiding places about the end of May and feed at once upoc the earliest appearing potato plants; soon after this the females lay thcii bright orange colored eggs on the under side of the leaves in batches ol various numbers up to fifty or more. The grubs hatch out in about i week and set to work to devour the foliage; their dark orange coloi renders them somewhat conspicuous, so that an attack can hardly fai to be noticed. When fully grown the insect changes to the pupal stag* in a cell a few inches below the surface of the ground. A period ol about eight weeks is required to complete a life cycle, and then a seconc brood of beetles appears, lays its eggs and starts new colonies of grubs the third brood comes out in September and may be observed crawlini or flying about in search of winter quarters. The broods are by n( means distinct, as all the grubs do not mature at the same time, conse< quently the inject may usually be found in all its stages at any tim( during the stunmer. Fig. 42. ThrM-lined Fig. 43. Three-lined Potato-beetle ; eggs, larva and pupa. The well-known and long-tried remedies are Paris green or ar&anati of lead combined with Bordeaux mixture, the latter ingredient assisting in warding off the attacks of fungus diseases and also in destroyin| Flea-beetles, when they are present, as they commonly are. Sprayin| should be done early in June as soon as any grubs are to be seen, agaii a month later and three times, at intervals of a fortnight, between th( end of July and thr first of September. The Three-Lined Potato Beetle {Lema trilineata)—Fig. 42—look: very like the Striped Cucumber beetle, but is larger and of a darker yel low color. Before the cominjr of the Colorado beetle, this was the chie insect enemy of the potato, but now, though common, it is not usualh particularly destructive; its life-history
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