Proceedings of the New Zealand Weed and Pest Control Conference1976 - Pesticides |
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Page 213
... stem . Stem Rust ( Puccinia graminis Pers . var . avenae Eriks & Henn ) 3. Irregular blotching of the leaves . ( i ) Irregular to linear , with a reddish - brown to purple margin . Frequently with sunken centre . Helminthosporium Leaf ...
... stem . Stem Rust ( Puccinia graminis Pers . var . avenae Eriks & Henn ) 3. Irregular blotching of the leaves . ( i ) Irregular to linear , with a reddish - brown to purple margin . Frequently with sunken centre . Helminthosporium Leaf ...
Page 178
... stem and an unsprayed control . Indications from earlier observa- tions were that stage of regrowth has a bearing not only on the suit- ability of the plant to aphid ... STEM 40- APHIDS / STEM 20 TABLE 2 178 Blue - Green Lucerne Aphid.
... stem and an unsprayed control . Indications from earlier observa- tions were that stage of regrowth has a bearing not only on the suit- ability of the plant to aphid ... STEM 40- APHIDS / STEM 20 TABLE 2 178 Blue - Green Lucerne Aphid.
Page 196
... stem weevil egg numbers and tiller damage tended to mirror losses in ryegrass herbage production . In view of this and as no other insect species capable of causing the trends reported herein were found in the soil or herbage on the ...
... stem weevil egg numbers and tiller damage tended to mirror losses in ryegrass herbage production . In view of this and as no other insect species capable of causing the trends reported herein were found in the soil or herbage on the ...
Contents
Chairmans summary | 1 |
Notillage establishment of lucerne G C Atkinson | 9 |
Insects affecting lucerne seed production | 19 |
Copyright | |
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Common terms and phrases
29th N.Z. Weed activity adults Agric Agricultural Research Centre alachlor aphid application areas assessed asulam atrazine Auckland autumn azinphos-methyl barley grass benomyl BGLA black beetle blue-green lucerne aphid brassicas Canterbury carbofuran chemical chlorpyrifos Christchurch crop cultivars cypermethrin damage diflubenzuron disease DSIR effect emergence ethofumesate fensulfothion field trials foliage fungicides germination gorse granules grass grub growth Hamilton harvest herbicides increased insect insecticides isazophos kg/ha larvae leaf legumes Lincoln linuron litres/ha lucerne lucerne yield maize method mite nematode North Island numbers oats P.O. Box Palmerston North paraquat pasture Pest Control Conf phorate picloram plants plots population post-emergence Proc pyri rates reduced replicates residual resistant Ruakura Ruakura Agricultural Research ryegrass samples season seed seedlings significant significantly soil sowing sown species spray sprayer spring stage summer Table tested treatments triclopyr untreated Weed and Pest weed control weeks weevil Wellington white clover white-fringed weevil Zealand