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but apparently they are not very injurious. In March, 1930, the larger 
tobacco sucVfly caused considerable trouble by destroying the buds and 
blossoms in a large cross-pollination test in a field in Caguas. 
Cutworms (iToctuidae) have been generally present both in tobacco 
seedbeds and in the field but not especially injurious, except on newly 
set plants in the Cayey-Aibonito district. 
CITRUS 
The ITlorida red scale ( Clary s omphalu s f icus Asian. ) and the purple 
scade ( Lepidos?.phes bechii ITewm. ) were about -as injurious to citrus as 
usual. 
White grubs ( Phyllophaga spp. ) were occasional]^ reported as injurious 
to young citrus troes. 
Reports have been received of a little damage to citrus by the vaquita 
( Diaprepos spengleri L. ) 
A red spider (Tetranychus sp. ) was more injurious on citrus than 
usual daring the excessively dry spring and summer. 
The citrus rust mite ( Phy 1 1 ocoTjtes oloivorus Ashm. ) was more injurious 
to citrus than usual during the excessively dry spring and summer. 
COCOIX'T 
The rhinocerus beetle ( Stratogus guadri f oveatu s P. de B.) was 
destructive in almost all coconut plantings, but apparently more injurious 
along the eastern and southern coasts. The Extension Division has been 
conducting a clean-up campaign against this pest, which has been more 
injurious since the hurricane of 1928 than formerly. 
CASSAVA 
A rare root weevil, Co elect emu s sulcatulus Boehm. , was found for 
the first time in Porto Pico in March, 1930, infesting about 2 acres of 
cassava, high above Comerio. Above 10 per cent of the underground sterns 
were rendered worthless for use. 
3AFAiiA 
The banana root borer ( Cosmopolites s ordidus G-erm. ) is 'now generally 
distributed in most parts- of the island .and doing considerable injury to 
bananas and especially to plantains in many sections. 
C0?7Z5 
The coffeo leaf miner ( Lcucopter ?., coff eella Staint.) was more injurious 
than usual and raorp injurious in the wetter sections than in those with 
