INSECTS INJURIOUS TO AGRICULTURE IN JAPAN 



43 



girdling and consequent killing of the branches. The pest existed 

 previously in Japan upon conifers, but the newly introduced host 

 apparently is well suited to its needs. 



MANGO INSECTS 



In Taiwan the insects on record as attacking mango are the 

 Formosan orange fly, C haetodacus ferrwginews var. dorsalis, Dacus 

 diver sus var. formosanus, Termes (Gyclotermes) formosanus, the 

 leaf hoppers Idiocerus niveosparsios, I. clypealis, and TettigonieUa 

 viridis, and the Florida wax scale, Geroplastes florldensis. The two 

 species of Idiocerus are important pests of mango in India. T . 

 viridis causes injury to various fruit trees and shrubs through lay- 

 ing its eggs in the smaller branches. The nymphs feed upon other 

 plants. 



INSECTS ATTACKING COCO PALMS 



The two most important pests of the coco palm in Taiwan are 

 the red palm weevil, Rhynchophorus ferrugineus Fab., and the 

 rhinocerus beetle, Oryctes rhinocerus L. The first is generally dis- 

 tributed throughout the Tropics. The injury produced by it is due 

 to the burrowing of the larvae in the stem, which results in the 

 death of the tree. 



BANANA INSECTS 



The only pests of banana and plantain recorded in Taiwan are 

 Cosmopolites (Sphenophorus) sordidm Germ, and Pentalonia 

 nigronervosa Coq. The eggs of C. sordidus are deposited singly on 

 the stem near the crown into which the larvae bore, particularly 

 injuring the young shoots. This species is a recent introduction 

 into Taiwan and is becoming a serious pest. 



FIELD-CROP INSECTS 

 LIST OF FIELD-CROP INSECTS 



HYMENOPTERA 



Tenthredinidae: 



Dolerus hordei Rohw 



Tomostethus juncivorus Rohw.. 



DIPTERA 



Tipulidae: 



Tipula parva Loew 



Tipula praepotens Wied 



Chironomidae: 



Chironomus oryzae Mats 



Stratiomyiidae: 



Stratiomyia barca Wlk 



Chloropidae: 



Chioropisca circumdata Meig. 



Chloropisca hordei Mats 



Chioropisca oryzae Mats 



LEPIDOPTERA 



Pieridae: 



Colias hyale poliographus Motsch 



Satyridae: 



Melanitis leda L 



Mycalesis gotama Moore 



Nymphalidae: 



Polygonia c-aureum L 



Pyrameis cardui japonica Stich 



Pyrameis indica indica Herbst 



1 Distribution symbols as follows: J., Japan; K., Chosen (Korea): 

 a nd 0., Okinawa (Loo-choo or Riukiu Islands), 



Distribution 



J. 

 J. F. 



J. K.F. CO. 

 J. 



J. F. 



J. K. F. C 



J.K. F. C 0. 



Host plants 



Barley. 

 Juncus. 



Rice, wheat, barley. 

 Rice. 



Rice (seed beds). 



Do. 



Rice. 



Barley. 

 Rice. 



Clover. 



Rice, barley, sugarcane. 

 Rice. 



Hemp. 

 Do. 

 Do. 



F., Taiwan (Formosa); C, China; 



