Proceedings of the New Zealand Weed and Pest Control Conference, Issues 32-331979 - Pesticides |
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Page 188
... populations of BGLA had reached 100 / stem , far exceeding recognised economic injury levels ( Kain et al 1977 ) . By contrast , overwintering aphid populations were low following autumn / winter grazing on 1 June or 30 June . However ...
... populations of BGLA had reached 100 / stem , far exceeding recognised economic injury levels ( Kain et al 1977 ) . By contrast , overwintering aphid populations were low following autumn / winter grazing on 1 June or 30 June . However ...
Page 189
... populations develop uncontrolled , the present trial suggests that possibly damaging populations were not experienced over sufficient time for damage to be expressed . Aphid populations peaked as the lucerne matured and populations were ...
... populations develop uncontrolled , the present trial suggests that possibly damaging populations were not experienced over sufficient time for damage to be expressed . Aphid populations peaked as the lucerne matured and populations were ...
Page 144
FARM SURVEYING OF BLACK BEETLE POPULATIONS IN SPRING AS AN INDICATOR OF LARVAL POPULATIONS IN SUMMER R.N. WATSON , R.S. MARSDEN and R.J. TOWNSEND Ruakura Soil & Plant Research Station , Hamilton Summary The estimation of black beetle ...
FARM SURVEYING OF BLACK BEETLE POPULATIONS IN SPRING AS AN INDICATOR OF LARVAL POPULATIONS IN SUMMER R.N. WATSON , R.S. MARSDEN and R.J. TOWNSEND Ruakura Soil & Plant Research Station , Hamilton Summary The estimation of black beetle ...
Contents
Presidential Address | 17 |
Control of meadow barley grass in pasture by the use of herbicides | 31 |
Initial studies into direct drilling of lucerne in Marlborough R I | 40 |
Copyright | |
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32nd N.Z. Weed activity adult Agric Agricultural alachlor application assessed atrazine Auckland azinphos-methyl bait barley BGLA black beetle browntop Canterbury chemical Christchurch crop cultivars damage density difenzoquat disease DSIR effect ester evaluation field crickets foliage fruit glyphosate gorse gorse seedlings grass grub grazing greedy scale growth harvest herbicides hexazinone increase infection insecticide isazophos Kain kiwifruit larvae leaf levels linuron litres litres/ha lucerne maize manuka mefluidide method mite mortality nematode numbers P.O. Box paddocks Palmerston North paraquat pasture pea aphid permethrin Pest Control Conf pesticides picloram plants plots populations Proc procymidone production programme pyrethroid reduced regrowth replicates residues Ruakura ryegrass samples season seed significant significantly simazine soil soldier fly sown species spray stem survival synthetic pyrethroid Table tested thistles tolerance toxicity treated treatments triadimenol trial untreated Weed and Pest weed control weeks weight white clover wild oat yield Zealand