SUMI/ARY 0? INSECT CONDITIONS IK HAWAII FOR 1932 
0. H. Swezey 
The pink sugarcane mealybug (Trionymus sacchari Ckll.) has become 
scarcer in the fields, owing to the establishment and wide spread of the 
introduced parasite An a gyrus s acchari col a Timb. from the Philippines. The 
parasite has been found generally established throughout the cane districts. 
The Chinese grasshopper (Oxya chinensis Thumb.) continues to spread, 
and is found more widely attacking cane on the islands of Kaui and Hawaii, 
although it is usually not severely injurious. The egg-parasite Scelio 
pembertoni Timb ., introduced from the Federated * r alay States, has been wide- 
ly colonized and has been recovered in two districts, which indicates that 
it has become established and will no doubt eventually check further in- 
crease of this grasshopper. 
The grubs of the Asiatic beetle (Anomala orientalis Waterh.) continue 
injurious en one plantation in the infested area. The seriously infested 
area in this plantation is somewhat larger than in the previous year. That 
the plantation has not suffered particularly is evidenced by the fact that 
it produced more tons of sugar this "<'ear than in any previous year. Scolia 
manilae Ashm. , the introduced Philip^ ' ne wasp, is enormously numerous in the 
cane fields, and its control of the root grub is sufficient to keep the lat- 
ter from being disastrously destructive in this plantation. 
There were extensive outbreaks of armywerms ( Cirphis unipuncta Haw. 
and Spodoptera mauritia Boisd.) in sugar plantations in several localities 
in the early part of the year. The numerous introduced parasites were not 
able to control them fully, aodartificial methods of control were practiced. 
The sugarcane weevil borer ( Rhabdocnemis ob scura Boisd.) continues 
significantly injurious in some localities but in general is well controlled 
by the introduced New Guinea tachinid Ceromasia sphenophori Vill . TThere 
the variety P.O.J. 36 has replaced other varieties there has 'oeen a lessen- 
ing of borer damage, as there has also been whore there has been better 
control of rats in the fields. 
The sugarcane leaf hopper (Pe r:ri.nsiel la sacchari ci da Eirk.) has remained 
under satisfactory control by its introduced natural enemies. No out- 
breaks of any conseauence rere known of; in fact, the pest was so scarce 
everywhere as to be difficult to find. 
The rice borer ( Chile, simplex Butl . ) has not ^iven particular trouble 
this year, and about normal rice croo was produced. 
The souring beetle ( Ca rpo-phi lus humc ra 1 i s Fab . ) has increased enormously, 
owing to the fact that the output of the pineapple canneries was limited; and 
on account of this much fruit' was knft to rot in the fields, furnishing oppor- 
tunity for this beetle to increase to a rmich greater extent then usual. In 
a pineapple field plowed up and planted to sugarcane the beetles were so 
numerous as to do considerable damage to the planted cane, destroying the 
"eyes" and also boring into the ends of the "seed" cuttings-. 
