36 



FARMERS BULLETIN 860. 



Cra.xp.krky SprTTLE Insect.^ 



Records of the last few years in Xew Jersey show that the cran- 

 berry spittle insect is of more consequence on blueberry than on 

 cranberry. P>om time to time, however, it has been brought to the 

 attention of o-rowers in Massachusetts anrl Wisconsin as a sucking 



insect of the vine. 

 The masses of spit- 

 tle w^hich cover the 

 n^'mph serve as a 

 means of identifying 

 this feeder, and it 

 has been rarely if 

 ever of sufficient im- 

 portance to warrant 

 the application of 

 remedial measures. 



A Mealybug." 



Wliere the vines 

 have been injured 

 recently by the cran- 

 berry girdler there 

 will be found fre- 

 quently masses of 

 white, cottonv mate- 

 rial (fig. 33) along 

 the injured portions 

 of the runners. On 



Fig. 32. — Cranberry vinehopper : Injury to cranberry stem 

 by oviposition of adults, and the eggs in position in the 

 stem. Much enlarged. 



closer inspection this cottony material will be seen to coA^er the backs 

 of the mealybugs, and in some cases their eggs or yovmg. The bugs 

 live by sucking sap from the vines, and it appears that conditions 

 are more suitable for obtaining food where the vines have been 

 gnaAved by the girdlers. Vines in healthy condition appear not to 

 be infested to any great extent by mealybugs. 



Scale Insects. 



In recent years some of the scale insects have proved decidedly 

 injurious to cranberry vines, notably the Putnam scale,^ on Long 

 Island, and the oyster-shell scale,* in Massachusetts, although in the 

 latter case the scale apparently is able to maintain itself only on 

 dry bogs. 



1 Clastiiptcra protrita Fitch. 

 " Pscudococvus adonUlum I>. 



'^ Aipidiotiis anci/liis rutiiam. 

 * Lepidosaphes ulmi L. 



