310 



JOURNAL OF AGEICULTURE OF P. E. 



ControL — An arsenate of lead spray, three pounds in fifty gallons 

 of water will effectually eontrol this pest. 



SWEET POTATO BUG {Spartoceva fusca). 



This lai<i(\ dull-brown colored bug" feeds in all its stages on the 

 sweet potato. Tlic nymphs and adults insert their beaks into the 

 steins of the vine and suck the juice. 



Colli rol. — The adults should be hand picked, but the nymphs 

 should be sprayed with kerosene emulsion diluted one to fifteen. 

 Directions for making tb.e emulsion are given on page 268. 



OTHER SWEET POTATO PESTS. 



Empoasca mali is at all times 

 idtundant (see Beans, page 

 276); Hystena hasalis (see 

 Carrots, page 284). 



TOMATO. 

 Epitrix cucumcns. 



This little black flea-beetle, 

 known in the United States as 

 the potato flea-beetle, occurs 

 very commonly on the tomato, 

 ]>refering it to any of the other 

 truck crops. 



It injures the plant by rid- 

 dling the leaves with its feeding 

 ])unctures, and in addition is 

 Fig. {i4.— Swcci I'otato Bug (Spartocera thought to spread a serious dis- 



fvK(i). Adult. (heatlv enlarged. t n .-i . 



{U. S. Bureau of Eutonioiogy.) ^^^^ of the tomato. 



The small, wdiite eggs are 

 laid in the soil, and the uiiiiiite thread-like larvaB feed on the roots. 

 Tlie ciilirc life cvch' is (•oiii])lc1c(l in about a month and a half. 



< 'mil nil. — 'IMic beetles may be successfully controlled by dusting 

 tlie plants with a mixture of e(inal parts of arsenate of lead and air- 

 .slacked lime or dry, leached wood ashes. 



THE iioRNwoBM {I'hlefjethontins sexta). 

 The larva of this sphinx moth is easily recognized by its large 



1 Wilt {Bacterium solanacearum) . 



