Effect of Copper Fungicides on Lead-Arsenate-Lime and Fixed Nicotine-Oil Sprays for Codling Moth

1939 ◽  
Vol 32 (2) ◽  
pp. 270-273
Author(s):  
L. A. Stearns ◽  
K. J. Kadow ◽  
M. W. Goodwin
Keyword(s):  
Codling Moth ◽  
Copper Fungicides ◽  
Lead Arsenate ◽  
Effect Of Copper

scholarly journals The effect of copper fungicides on the rate of photosynthesis and the transpiration of hop plants

2011 ◽  
pp. 117-123
Author(s):  
Jaroslav Pokorny ◽  
Josef Pulkrábek ◽  
Karel Krofta ◽  
Josef Ježek
Keyword(s):  
Photosynthetic Rate ◽  
Copper Content ◽  
Copper Fungicides ◽  
Before And After ◽  
Elemental Copper ◽  
Rate Of Photosynthesis ◽  
Accredited Laboratory ◽  
Effect Of Copper ◽  
Copper Fungicide ◽  
Infrared Analyzer

The paper evaluates the effect of copper fungicide spraying on the rate of photosynthesis and transpiration of hops, the influence of spraying on the elemental copper content in the leaves and cones hop variety Agnus. Photosynthetic rate was measured by LC pro+ (infrared analyzer) in the Hop Research Institute Saaz in the field in some periods of 2008, 2009 and 2010. Dry cones and leaf samples (taken before and after application of copper fungicides) were analyzed in an accredited laboratory for elemental copper.

Laboratory assessment of the toxicity of field-weathered deposits of insecticides to larvae of the codling moth, Cydia pomonella (L.)

1964 ◽  
Vol 55 (1) ◽  
pp. 35-47 ◽  
Author(s):  
M. Gratwick
Keyword(s):  
Larvicidal Activity ◽  
Larval Mortality ◽  
Cydia Pomonella ◽  
Fruit Size ◽  
Heavy Rain ◽  
Codling Moth ◽  
Glass Container ◽  
Laboratory Assessment ◽  
Lead Arsenate ◽  
Fruit Damage

The toxicity of naturally weathered deposits of 21 chemicals to larvae of the codling moth, Cydia pomonella (L.), was assessed by spraying apple trees in the orchard and testing samples of the fruit picked at various intervals after treatment. Each apple was placed in a separate glass container with one first-instar larva from a laboratory culture, and larval mortality and damage to the fruit (defined as removal of a portion of the skin) were recorded after three days in a constant environment.The site of entry of the larvae was shown to vary with fruit size, calyx entries decreasing and side entries increasing with increase in the surface area of the fruit.The relationship between larvicidal activity and age of the spray deposit for periods up to ten weeks after spraying is illustrated graphically; data are presented for fruit damage caused by larvae applied one and three weeks after spraying.On the basis of larval mortality and fruit damage recorded in tests on deposits up to three weeks after application, a spray containing 0·1 per cent, carbaryl was the most effective, followed by 0·05 per cent, fenthion, while Bayer 5024, Zectran, DDT, DDD (all at 0·l per cent.) and 0·04 per cent, azinphos (as the methyl or ethyl homologue) were only slightly less effective. Deposits from 0·1 per cent. Kepone, 0·02 per cent, diazinon, 0·11 per cent, malathion, 0·01 per cent, parathion and 0·05 per cent, carbophenothion, dimethoate and ethion also caused 90–100 per cent, mortality when fresh, but were less persistent. Fresh deposits from 0·1 per cent, endosulfan, 0·04 per cent, dioxathion, 0·05 per cent, phenkapton, 0·02 per cent, phosphamidon, 0·2 per cent, lead arsenate and 0·6 per cent, ryania only killed 50–88 per cent, of the larvae, and their residual toxicity was proportionately low.Heavy rain soon after spraying caused a large reduction in deposits from wettable powders but the accompanying reduction in larvicidal activity was shown to be greater in the case of carbaryl than for DDT or DDD.

Codling Moth Control with Lead Arsenate Substitutes

1937 ◽  
Vol 30 (1) ◽  
pp. 82-86
Author(s):  
S. W. Harman ◽  
T. W. Reed
Keyword(s):  
Codling Moth ◽  
Lead Arsenate

Lead Arsenate "Dynamite" Codling Moth Sprays in Pennsylvania*

1941 ◽  
Vol 34 (2) ◽  
pp. 256-263
Author(s):  
Harlan N. Worthley ◽  
Harold M. Steiner
Keyword(s):  
Codling Moth ◽  
Lead Arsenate
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