CABBAGE APHIS.

Dominion, Volume 6, Issue 1647, 14 January 1913, Page 10

CABBAGE APHIS.

].;'■[ , aphis is one of the worst: ■■■•' Insects with which the cabbage grower- '..-"■'.' ' has to contend.:';. The. insects breed very.; quickly;, and-live on the'juices; of 'the • ; ; j>lant,:,.;',';ln "a'dry .-season,., when plants, ; : :are : siunted.and are inaking littlo growth, "'.•'.".'• the'pestisat'itsworsti';.- r-ff.,:. •-,v '■ :•;,.,•;• The; young,' when first' hatched,; ore (yel- ■■ .- ldw; ; in":"tho second,^wingless, stage,.dull -. \, olive-green, covered with a mealy bkcm; ,;,when full-grown, of a greyish-green tint, ,';with the eyes Megs, spots on .either side of ;■•'.-;'the body and tips of the;antennae black; ''„'■■: ,tte, winged,forms .axe of a,much lighter .■ :;,.• .• green; colour,'"'''.-. * ''A>V ." : : : ;;,. ( -■"! -" . ■.'... v■'.'"■'..'. '■' As" to'' the -remedies ':'. "and' treatment,-; ;■■' '■: .spraying .with tobacco and soap wash 7:early in tho season,' when the plants show ■.;.;'the first; signs'of .its attack,',;, is- lecoih-; ■•.mended; also dusting with : soot or lime ■;V ,early iniho season. . ■' *.:.', ; ; ■ . For a spray with kerosene emulsion the' .'./ formulae/is:—Hard soap; Jib.', kerosene 2 ;•',,.;' gallons; boiling water I,gallon.' Dilute or ;/r. dissolve in,22 gallons, of water.' ,:'• ,' : , ':'.' -Dissolve jib. of hardisoap in 1, gallon 1 . nf boiling water, after, which the vessel.is ■ ■■!.: removed vfrom \the neighbourhood;of,the • are.xthß'keroseW.is added, and tho■ two- ;■'.'• ;churnod ; for ten minutes. Ono essential ' condition of .success' , in' making .this 7,; is that the liquids should.be as ■ Avarin asipossiblo,- "- It is .also' necessary... .';.. ■: that;th'S';water.,be as'soft'.as possible. ' : In ,■;.".-;■ compound, /.the. main. ;7 . . troubleiisVih getting ;.a. true imulsion ■ • - /.which icair only, be done by .thorough agi-[■'■-■V ..tation.:. '.This lis-best'done 1 by pumping '•-'. ■'■'-.. the mixture into itself for. some minutes. £■{■•■'■ >Vhen : ithis creamy mixture becomes cold, !■: -it gets thick'-and'-almost;solid, and there. .should -be-no.troce of free.oil onjthesur-. L''".'...face.'>;'lf there is'still unemulsified oil, }•':■/••.:;:.''.tho best pian is to add.some more boil; »'; : "-' ; ; ing'soap solution and pump again. Free. fe - "oil destroys- r the-foliage./; Caio should be, f-', ;.''■■'v. taken. to.use the 'best -kerosene, and" gcod ': ■'■■'■ ■'■■•;eoap'.i'i■ Kerosone'being highly iiinam-j^';:>^'inablß,.'-.par.';'partionlai'attention- to..'the. £■'.-'■■■^directions'for -miring well,away from the £■:■■>':■■■ fire. '/.".Boil the'; soap .and water .in' one !' ,': ;'vessoi;'.'and-'carry/'it away from the fir© be-K'.'.-fore.'mixing 'with-, the kerosene: '.4ny f/.-S;'; kind'of vessel may'.' be.used.', ' Kero.-nie !.;'. Vattacks.indiairubber; -consequently '.the iU ■■'.'' tubiugi'ahd, indeed,.the whole, spraying J, •:•■ ■ • outfit,: must 'be' well ..-washed ; with hot £''•'; ' water directly after use..- -. !.;..;•!,.- Sometimes it. is of advantage.,to pi opare f ■■.'"'-'■ a quantity". of; emulsion as \ a stock, for l : : X l .-'use as'iequired/ "When this is done, and' f" -;''■ • ■•'■' it is required : to dilute it to niake' up a : {-: ■■■ '■'spray,'"this : should bo done by : adding;. '■ toiling water to it, 'and not by molting \. '.; it over tho fire,' which is dangerous, esf' jiccialty indoors,