Porina control
Sir, —May I enlarge on my previous letter? I noticed that after the first year of trapping, the porina and grass grub beetle catch diminished to such an extent that I would catch only a few dozen over the whole season. That seems to prove that the infiltrating rate from adjoining land is very slow, and that there is no swarming or flights. Army worm moths, the black greasy cutworm, continue to form the main catch, although on nothing like the scale of years ago, and even these are getting less and less. The only spray used is Bordeaux for control of leaf curl on peaches and nectarines. Other than that, I use no insecticides or fungicides, and for years I have had no damage from pests, and the quality of fruit and vegetables is superb.—Yours, etc. ALEX BLACK. Blenheim, November 2, 1972.
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Press, Volume CXII, Issue 33066, 6 November 1972, Page 16
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145Porina control Press, Volume CXII, Issue 33066, 6 November 1972, Page 16
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