SPRAYING COMPOUNDS

Horowhenua Chronicle, 22 March 1915, Page 2

SPRAYING COMPOUNDS

A considerable number ot eSporimente a the testing of spraying compounds or orchard trees have been inaugurated throughout the Dominion during the last feu- years. Those experiments ■ ave been carried out at the experimenial I'anuts. including the' Weraroa Experimental'' "Farm. The results of these experiments at the "Weraroa i'arm arc given in the reports of the : a nil manager, Mr J. Drysdale. and published in the January number of ihe Journal of Agriculture. Mr :i rysdale's reports are given below and 'lonld prove of great interest and br-n----!|1 !.) "i- ■:;) 1 i eh,, rdist 'The r;>pori^ . r'i,. ie:.i . only published after at i.wu ,■ - . n's • 'poratiiuif-. (s <;ir.r- ;• 1.0-11). ••. rll and : i!„. \diieiT:. •it t.' r 1 lit ; heavy rai;. fuilow•i; soon after the spray had dried ■••aking mi apparent difference. (Sea■m 1,911-12). —Used for eodlin moth and oar leech. Very little eodlin moth •mo. but appears to be very effective, "estroys leeeh. Does not remain so i."iir in suspension as Swift's or Blue- '< 11. An agitator necessary. Burnis g of foliage not more than for other brands. Myth's ''Bluebell" asenate of lead v-ason 1010-11)— Mixed more freely ! ' an Swift's and remained in stispcni n very well. Has not burned the liage. Was us<xl on trees that were "feetod with moth previously. So r not one apple has been lost, though . iare signs that the grubs have "en poiswned. (Season 1911-12).— ed for eodlin moth and pear leech, 'i appeared to be very effective a rid was very good to use. as it remained ■ long time in suspension. ' bawes's arsenate of lead (season I ''11-l 2). —Mixed well. Good for ■odlin moth, but fruit much russeted, ■nd foliage badly burnt, except-~*pF lofiie trees not reached by the ean(v •norning sun. linker's arsenate of lead and lime-sul-"bur solution (season 1011-12).- Used on ji'-ars. For control of scab in Bon 'Im-tieu was found to l>e effective. Ouiio young foliagb was burned to some .-s-ft lit. but not seriously, while older iolia.'. r i' was not injured. If any rusit was to a very minor extent, t'srd without arsenate for control of spider on apple trees. This was ,rrv M'i'utive and did no injury to ■topic foliage. It may be remarked 'on 1 lie winter spray with red oil— I in l"i to 17—will destroy the eggs of f r, | spider, and that the summer I .! 111*t• nt- will be necessary only oeca- ■ :"tially. (Season 1913-1 tV- Roger'* J :iii'-sulphur (solution used on apple i os at 1 in 33. It effectively eonti lied red spider and codliti moth, and caused no burning of the foliage. Rower's lead arsenate mixed freely with water adhered well to the foliage and did not burn. Used on pear trees infected with leech; it gave very satisfactory results. Sherwin Williams's arsenate of lead (season 1912-13).—Used for codlin moth and leech and was effective without scorching the foliage. Mixed very readily and remained in suspension better than is usual for such mixtures. "Gargoyle" red spraying oil (season 1912-13).- —At 1 in 10 this spray was ineffectual for scale. Had the same effect on wotflly aphis as all such niix s tures hare, vi'.., killed all ii touohed. I "* > is<- *

Consider it a well-mixed compound. I'hy tonal insecticide (season 1912-13). —This was used for powdery mildew, and it appeared to bo ot use, but wet weather prevented conclusive trial. Lawes's "Anti-blight" (season 191213). —Effective for powdery mildew on apples anil tomatoes and scab on pears (Season 1913-14)— Spray wiis used on badly blighted tomatoes wifli satisfactory results.'

Sherwin Williams's lime-sulphur solution (season 1912-13). — Used lor rod .spider and powdery mildew. Killed initee. but almost defoliated the trees. At reduced strength, two-thirds. was ineffective and caused a largo loss of foliage. (Season 1913-11). — Sprayed on apple, trees infested with red spider at lin 50. flic spider was controlled but the foliage was scorched. ft was not effective on scale at the same strength.