A IM ) K X P K S T S 1 N X E W Z E A L A X D 



on the bark and buds of cherry trees during the winter. In spring the 

 eggs hatch, and the insects, rapidly . i epiodueing. attack the young snoots 

 and leavo^. Observers in other- countries have noted that there is a 

 summer migration of winged females to cruciferous plants, where 

 Colonies are established, and whence there is a return migration during 

 the autumn to the original host. The wingless females are black, with 

 part of the legs yellow, while the vonng individuals are- pale in colour; 

 the winged, females have a. green jib'b'.m* n. from which aris,> the black 

 ''honev-tuhes." 1 Since all ihe ovi-i-whitei ing eggs have hatched bv the 

 time the buds open, the insect can be then controlled by applications of 

 nicotine-sulphate. 



CABBAGE AIMII^ (JZreyicwyiie brftssizcr).; - - r l"he cabbage aphis, or 

 cabbage green I'y. is widely distril)iitel throughout I 1 '" vrorld, and has 

 become a sei f in Ne\\ Zealand, can-ing < on.-idviab'c damage to 



cniciferc; infests ta.pe. turnip, cabltage. l>ius<els sprout-s, 



cauliflower, a^ \\ell as related weeds, Mich as wild mustard, shepherd's 



FIG. 9. 



(1) IVa^'i loaves attacked by mack IVacli apbis. (2) Colony of Oab'.viv.c ip'iis on leaf. 

 (8) Stem of insignis pine attacked hy Chennes. (4) Grape Phylloxe-x and ;;alis on 

 vine roots. (5) (irupe l'1-.ylloxeia s>'alis on vine leaf. ;> Woolly ap'ii^ on apple twig. 

 (7) (Jails of Poplar a plus. (Figs. 1, 2 and (i by W. C. Da vies : FU. 4. a!tr U.S. Dept. 

 Agric. ; Fi,-. 5. after N.Z. Dept. Acrrii-.) 



45 



