Codling moth control in pears

Evers, Chad; Van Steenwyk, Robert A; Kiss, Attilla B

Summary:

This trial was designed to evaluate the efficacy of new reduced-risk insecticides as possible replacements for the grower standard insecticides. The trial was conducted on mature ‘Bartlett’ pear trees in a commercial orchard near Fairfield, CA. Thirteen treatments were replicated four times in a RCB design. Each replicate consisted of an individual tree. Treatments were applied with a handgun orchard sprayer operating at 250 psi and delivering a finished spray volume of 200 gpa (2.87 gal/tree). Application timings were based on degree-days (DD). DD were calculated with a 24 Mar biofix for moths from the overwintering generation and a 12 Jun biofix for moths from the first generation using a single sine horizontal cutoff model with a lower threshold of 50°F and an upper threshold of 88°F. Maximum and minimum air temperatures were obtained from the Suisun Valley CIMIS #123 weather station at Solano County, CA. Treatments were applied on 25 Apr (236 DD from the 1st biofix), 23 May (651 DD from the 1st biofix), 24 Jun (295 DD from the 2nd biofix) and 10 Jul (634 DD from the 2nd biofix). Control of the first generation CM (overwintering flight) was evaluated on 10 Jun by inspecting 100 fruit per replicate for CM infestation. Control of the second generation (first generation flight) was evaluated at commercial harvest on 5 Aug for CM infestation and damage by inspecting 250 fruit per replicate. Control of motile TSSM and PP nymphs was evaluated weekly from 2 Jun through 28 Jul by sampling 10 exterior and 10 interior leaves per replicate. The leaves were brushed and the arthropods removed from the leaves were counted under magnification (20×) in the laboratory. Data were analyzed using ANOVA and means were separated using Fisher’s protected LSD, (P ≤ 0.05).

Title:	Codling moth control in pears.	1 views
Name(s):	Evers, Chad, author Van Steenwyk, Robert A., author Kiss, Attilla B., author
Type of Resource:	text
Genre:	Article
Issuance:	monographic
Date Issued:	2009-01-01
Extent:	1 online resource
Language(s):	English eng
Summary:	This trial was designed to evaluate the efficacy of new reduced-risk insecticides as possible replacements for the grower standard insecticides. The trial was conducted on mature ‘Bartlett’ pear trees in a commercial orchard near Fairfield, CA. Thirteen treatments were replicated four times in a RCB design. Each replicate consisted of an individual tree. Treatments were applied with a handgun orchard sprayer operating at 250 psi and delivering a finished spray volume of 200 gpa (2.87 gal/tree). Application timings were based on degree-days (DD). DD were calculated with a 24 Mar biofix for moths from the overwintering generation and a 12 Jun biofix for moths from the first generation using a single sine horizontal cutoff model with a lower threshold of 50°F and an upper threshold of 88°F. Maximum and minimum air temperatures were obtained from the Suisun Valley CIMIS #123 weather station at Solano County, CA. Treatments were applied on 25 Apr (236 DD from the 1st biofix), 23 May (651 DD from the 1st biofix), 24 Jun (295 DD from the 2nd biofix) and 10 Jul (634 DD from the 2nd biofix). Control of the first generation CM (overwintering flight) was evaluated on 10 Jun by inspecting 100 fruit per replicate for CM infestation. Control of the second generation (first generation flight) was evaluated at commercial harvest on 5 Aug for CM infestation and damage by inspecting 250 fruit per replicate. Control of motile TSSM and PP nymphs was evaluated weekly from 2 Jun through 28 Jul by sampling 10 exterior and 10 interior leaves per replicate. The leaves were brushed and the arthropods removed from the leaves were counted under magnification (20×) in the laboratory. Data were analyzed using ANOVA and means were separated using Fisher’s protected LSD, (P ≤ 0.05).
Identifier:	fgcu_ir_000936 (IID)
Note(s):	The publisher's version of the article is available at https://doi.org/10.4182/amt.2009.A24
Subject(s):	Codling moth Pears. Insecticides.
Links:	https://doi.org/10.4182/amt.2009.A24
Persistent Link to This Record:	http://purl.flvc.org/fgcu/fd/fgcu_ir_000936
Use and Reproduction:	Copyright held by publisher.
Use and Reproduction:	http://rightsstatements.org/vocab/InC/1.0/
Host Institution:	FGCU
Has Part:	Arthropod Management Tests.

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Codling moth control in pears