OCR Text |
Show COUNTY AGENT ADVISES ON SPRAY RESULTS Codling moth flight is at a low point in pear and apple orchards in Utah county at this time, and the attack made by the first brood of worms appears to be over with and practically all orchard growers grow-ers able to report the greatest victory vic-tory over these pests in many years, according to Clarence D. Ashton. All growers are willing to agree that the weather was on their side, but many growers are giving much of the credit for the exceptionally excep-tionally good control of codling moth to the use of DDT in the spray program, he stated. A careful survey during the past two weeks of orchards in which DDT is being used reveal that control con-trol of worms is practically one hundred per cent. In all cases where careful spraying was done for orchard mites before the DDT program was begun, there is no damage to the orchard from these very destructive pests. However, in a few cases where mites were not controlled before beginning the DDT spray, serious damage is being be-ing done by the mites. The woolly apple aphid is another an-other insect which becomes a serious seri-ous problem when DDT is not used in the orchards. It is appearing appear-ing now as masses of white woolly growths covering sucker shoots, pruning cuts and other scars on tho trees. During the past few days aphids have been crawling from beneath the woolly growths and moving to new locations throughout the trees, where they will start a new colony of aphids which will produce the same kind of woolly growth. While a codling moth spray is not necessary at this time, it will be a wise orchard man who applies ap-plies a special spray for woolly apple aphiils if they are becoming noticeablo in tho orchard. A spray made of either 1 pint 40 nicotine sulphate or 1 pint 5 rotenone compound plus to 1 gallon of summer oil in each 100 gallons water and applied thoroughly thor-oughly to all parts of the tree and to both sides of leaves with special attention given' to visable colonies of aphids will give quite a satisfactory satis-factory control of woolly aphids and check increase of any brown mites infestation. |