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and adults are always present after July. In general, the insect 

 increases in numbers toward autumn, so that apphcations of kerosene 

 emulsion with insect powder at the beginning of the outbreak effectually 

 reduce this pest. In spraying, the vines should be surrounded by a 

 tent so as to prevent the adults from escaping by flight. 



The vine-infesting Ccrambycid, Xylotrechns pyrrhoderus, Bates, 

 appears once a year, passing the winter within the vine stems in the 

 larval stage. In May or June the larva attacks the wood beneath 

 the bark so that the upper portion of the vine withers. Pupation 

 takes place within the stem and the adult appears in August or in 

 September. It usually lives a week and lays eggs in the bud, and 

 the resulting larvae bore into the stem. Unlike most Cerambycids, 

 this species does not eject its excrement through the aperture of the 

 burrow, so that detection of its presence is rather difficult, though 

 late in the season the infested area may be distinguished b}- the dark 

 colour of the bark and should be removed with a knife. 



Aoyama(T.). Kansai no Gaichu ni kwamsuru Chosa. [Investigation 

 on Injurious Insects of the Sugar-Beet. ] — Tokubetsuhoholu, [S])ecial 

 Report], Korea: Heian-Nando Seedlimj Plantation Sta., no. 1,. 

 June 1920, 31 p^)., 4 plates, 1 map. 



The weevil, Scepticus insularis, Roel., is a one-brooded insect which 

 passes the winter in the larval stage, pupates at the end of March and 

 appears as an adult at the beginning of April. Serious damage is 

 done by the adults to the buds of sugar-beet from the end of April 

 to the beginning or middle of May. Tlie insect also feeds on grasses, 

 Bmnex japonicus, Anthriscns silvestris, Chelidonium majus, Medicmjo 

 sativa, Capsella bursa-pastoris and Draba nemorosa, and these plants 

 may be utihsed as trap-crops. 



As regards other Coleopterous pests, Serica sp. has one annual 

 generation, overwintering in the larval stage, pupating in March and 

 the adult appearing at the beginning of April. The adults devour 

 the buds, and the larvae, which Hve underground two inches below 

 the surface, eat the young roots. Opatrum reticidatiiw , Motsch., 

 is a one-brooded beetle. It passes the winter as a larva and pupates at 

 the end of March, the adult appearing at the beginning of April. 

 The adults injure young buds, and the larvae which live just beneath 

 the ground (half an inch deep) attack the young roots. Epicaiita 

 megalocephala, Gebl., is also one-brooded, over-winters in the 

 larval stage and pupates in April, the adult emerging at the end of 

 May. It occurs in large numbers and destroys the fohage. 



Lepidopterous pests include Zmckenia fascialis, Cram., which has 

 three generations, the adult moths appearing in June, July, and at the 

 end of August or in September : it hibernates in the soil as a pupa. 

 The caterpillars of the third brood do the most serious damage to the 

 foliage. Baratlrra brassicae, L., has two generations and winters in 

 the pupal state. The caterpillars devour the foliage. Laphi/gma 

 exigv.a, Bb., appears in June and in July, and passes the winter as a 

 pupa. The caterpillars are nocturnal feeders on the foliage. 



Pegomyia vicina, Lint., has three generations, in June, July and 

 August, and passes the winter as a pupa. The larvae mine the leaves. 



