scholarly journals Evaluation of New Foliar Materials to Control Insects on Potatoes, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 128-129
Author(s):  
Brian A. Nault ◽  
John Speese
Keyword(s):  
Agricultural Research ◽  
Visual Estimation ◽  
Eastern Shore ◽  
Bare Ground ◽  
Egg Masses ◽  
Insecticide Application ◽  
Untreated Check ◽  
Extension Center

Abstract Potatoes were planted on 3 Apr at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of four 20-ft-long rows. Plots were separated across rows by 3 ft and within rows by 6 ft of bare ground. The experiment had 5 treatments plus an untreated check arranged in a RCB design replicated 4 times. Insecticide application timings were targeted for control of CPB, not ECB. Initial applications were made on 29 May when small (LI + L2) and large (L3 + L4) CPB larvae were present and many of the egg masses in the field had hatched. One additional application of each treatment was made on 12 Jun. Insecticides were applied using a propane-powered backpack sprayer equipped with 6 flat-fan nozzles/2 rows calibrated to deliver 46 gpa at 40 psi. On 13 Jun and 1 Jul, potato leafhoppers, Empoascafabae, were controlled with Dimethoate 4EC at 0.25 lb (AI)/acre using a tractor-mounted sprayer that deliv-ered 40 gal. of spray/acre at 100 psi. Data were taken weekly from 3 through 30 Jun from the center 2 rows of each plot and included the following: the number of CPB adults, egg masses, small and large larvae/10 randomly selected stems in each plot, the number of ECB damaged stems/20 randomly chosen stems per plot, and a visual estimation of percent defoliation within each plot. The center 2 rows of each plot were harvested on 10 Jul and tubers were graded and weighed.

scholarly journals New and Labeled Foliar Materials and Tank Mixesl To Control Insects on Potatoes, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 129-130
Author(s):  
Brian A. Nault ◽  
John Speese
Keyword(s):  
Untreated Control ◽  
Agricultural Research ◽  
Visual Estimation ◽  
Eastern Shore ◽  
Bare Ground ◽  
Egg Masses ◽  
Insecticide Application ◽  
Extension Center

Abstract Potatoes were planted on 3 Apr at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of four 20-ft-long rows. Plots were separated across rows by 3 ft and within rows by 6 ft of bare ground. There were 6 treatments plus an untreated control arranged in a RCB design replicated 4 times. Insecticide application timings were targeted for control of CPB, not ECB. Initial applications were made on 28 May when small (LI + L2) and large (L3 + L4) CPB larvae were present and many of the egg masses in the field had hatched. Two additional applications were made at 14-d intervals (11 and 30 Jun). Insecticides were applied using a propane-powered backpack sprayer equipped with 6 flat-fan nozzles/2 rows calibrated to deliver 46 il. of spray/acre at 40 psi. Data were taken weekly from 3 through 30 Jun from the center 2 rows of each plot and included the following: the number of CPB adults, egg masses, small and large larvae/10 randomly selected stems in each plot, the number of ECB-damaged stems/20 randomly chosen stems per plot, and a visual estimation of percent defoliation within each plot. The center 2 rows of each plot were harvested on 10 Jul and tubers were graded and weighed.

scholarly journals Foliar Sprays to Control Insects in Wheat, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 318-318
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Aphid Species ◽  
Eastern Shore ◽  
Bare Ground ◽  
Foliar Sprays ◽  
Compressed Gas ◽  
Extension Center ◽  
Flat Fan Nozzle

Abstract Wheat was planted on 2 Nov, 1994, at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Plots were 25 ft long by 5 ft wide, with 7 inch spacing between rows. Each plot was separated from each other by 3 ft of bare ground and replicated 4 times in a RCB design. Insect pressure from all species was low this year. Treatments were applied on 5 May using a propane compressed gas backpack sprayer with a 3 flat fan nozzle boom which delivered 20 gal water/acre at 40 psi. Evaluation criteria consisted of counts of insects present on 6 ft of row. EGA was the dominant aphid species with low numbers of BCOA present. Numbers of both species were analyzed together as a complex.

scholarly journals Insecticides to Control Cucumber Beetles in Spring and Fall, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 130-130
Author(s):  
John Speese
Keyword(s):  
Heavy Rainfall ◽  
Agricultural Research ◽  
Evaluation Criteria ◽  
Eastern Shore ◽  
Bare Ground ◽  
Hollow Cone ◽  
Yield Data ◽  
Foliar Sprays ◽  
Extension Center ◽  
Spring Planting

Abstract Cucumbers were planted on 17 Jun and 12 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of 2 rows 25 ft long with 5 ft spacing between rows. Plots were separated from each other by 10 ft of bare ground. Treatments were replicated 4 times in a RCB. Prior to planting, the Admire and Furadan treatments were applied in furrow using a single nozzle boom backpack sprayer. The foliar sprays were applied with a 3 hollow cone nozzle boom backpack sprayer delivering 45 gpa at 40 psi. The Adios AG treatments were broadcast over the appropriate rows using a hand-held shaker on the same dates as the foliar sprays. Application dates were 18 and 24 Jul and 2 Aug for the spring planting and 30 Aug and 9 and 23 Sep for the fall planting. Evaluation criteria were: beetle counts on a 6 ft row section of each plot. Dates with significant differences are recorded in the tables. No attempt was made to obtain yield data, because the growth of the crop across the field was highly variable due to heavy rainfall, especially in the spring planting.

scholarly journals Foliar Sprays to Control Insects on Potatoes, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 160-160
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Row Spacing ◽  
Eastern Shore ◽  
Bare Ground ◽  
Foliar Sprays ◽  
Extension Center

Abstract Potatoes were planted on 26 Mar at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of 4 rows 20 ft long with 3 ft between-row spacing and 6 ft of bare ground between plots Treatments were replicated 4 times in a RCB.

scholarly journals Use of Fipronil (Regent) and Imidacloprid (Admire 2F) at Planting to Control Insects in Potatoes, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 166-166
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
The Other ◽  
Row Spacing ◽  
Life Stages ◽  
Eastern Shore ◽  
Bare Ground ◽  
Extension Center

Abstract Potatoes were planted on 27 March at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of 4 rows 25ft long, planted on a 3ft row spacing. Plots were separated from each other by 6ft of bare ground, and each treatment was replicated 4 times in a RCB design. Treatments were applied in furrow prior to planting using a hand-held shaker for the Regent 1.5G formulation and a single nozzle boom backpack sprayer for the other formulations. All CPB life stages on 10 randomly chosen stems/plot were counted weekly. Dates for which there were either significant differences or noticeable trends are recorded in the tables. Numbers of PLH nymphs on 10 randomly picked compound leaves/plot were sampled. Percent defoliation/plot was estimated on the indicated dates in the tables. On 12 July, the center two rows of each plot were harvested and graded to determine yields.

scholarly journals Evaluation of Foliar Materials to Control Lepidopterous Larvae on Sweet Corn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 97-97
Author(s):  
Brian A. Nault ◽  
John Speese
Keyword(s):  
Sweet Corn ◽  
Agricultural Research ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Fresh Market ◽  
Untreated Check ◽  
Extension Center

Abstract Sweet corn was planted on 30 May at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25-ft-long row, which was flanked by untreated guard rows, all separated by 3 ft space. There were 9 treatments plus an untreated check arranged in a RCB design with six replications. Two of the treatments were applied on a 5-6 d schedule (18, 25, and 31 Jul), whereas the remainder were applied on a 3-4-d schedule (18, 21, 25, 28, and 31 Jul). Materials were applied with a propane-powered backpack sprayer equipped with a single, hollow-cone nozzle/row calibrated to deliver 41 gal of spray/acre of 40 psi. Sprays were directed at the ears and were initiated when corn was in full silk. On 4 Aug, 15 ripe ears were taken from each plot and rated for damage as follows: fresh market (no damage), processing (no damage + damage only within 1.5 inches from the tip), cull (any damage between the base and 1.5 inches from the tip). The total numbers of live larvae of each species/15 ears were also counted.

scholarly journals Comparison of Various Soil Insecticides and Rates for Insect Control in Potatoes, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 160-161
Author(s):  
John Speese
Keyword(s):  
European Corn Borer ◽  
Agricultural Research ◽  
Row Spacing ◽  
Life Stages ◽  
Eastern Shore ◽  
Bare Ground ◽  
Corn Borer ◽  
Short Season ◽  
Soil Insecticides ◽  
Extension Center

Abstract Potatoes were planted in two fields on 15 March at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. One field was planted in the short season cultivar ‘Superior’, the other field in the long season cultivar ‘Snowden’. Plots in both fields consisted of 4 rows 25ft long on 3ft row spacing with 6ft of bare ground between plots. Treatments in both fields were applied in furrow prior to planting with a single nozzle boom backpack sprayer. Treatments were replicated 4 times in a RCB design. Foliar sprays (rates, dates and materials indicated in tables) were applied by a tractor-mounted sprayer delivering 40 gal water/acre at 100 psi. Spray decisions were based on the following CPB thresholds, determined by weekly counts on 10 randomly chosen stems/plot: 4 small larvae, 1.5 large larvae, or 0.5 adults/stem. Dates and life stages with significant differences are listed in the tables. Secondary pests on 10 randomly picked compound leaves/plot and percent defoliation were sampled on the dates indicated in the tables. Both fields were sprayed on 2 June with Monitor 4EC (lqt/acre) to control European corn borer.

scholarly journals Comparison of Pymetrozine (Cga 215944) and Imidacloprid (Provado) Foliar Sprays to Control Aphids in Tomatoes, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 185-185
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Test Field ◽  
Single Application ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Potato Aphid ◽  
Single Row ◽  
Foliar Sprays ◽  
Extension Center ◽  
Aphid Populations

Abstract Tomatoes were transplanted on 9 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single row 20 ft X 5 ft, bordered on each side by an untreated guard row. On 1 Oct, heavy potato aphid populations developed in the test field. A pre-count of live aphids on 5 randomly picked compound leaves/plot was taken on this date and followed by a single application of all treatments. Treatments were applied with a backpack sprayer equipped with a 3 hollow cone nozzle boom and delivering 46 gal water/acre at 40 psi. To evaluate efficacy, the plots were sampled as previously described for the pre-count on the dates indicated in the table.

scholarly journals Foliar Sprays to Control Insects in Fall Peppers, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 136-137
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Plant Spacing ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Foliar Sprays ◽  
Marketable Fruit ◽  
Extension Center

Abstract Peppers were transplanted on 31 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25ft long rows with 3ft between row spacing and 1ft between plant spacing. Each plot was bordered on each side by an untreated guard row and replicated 4 times in a RCB design. Treatments were applied on the dates indicated in the table with a backpack sprayer using 3 hollow cone nozzles/row and delivering 60 gal water/acre at 40 psi. Evaluation criteria consisted of hand-harvest of marketable fruit on 10 healthy, uniform-sized plants/row (.00062 acre) and GPA counts on 5 randomly picked leaves/plot on 06 Oct. Harvesting was done in this manner due to uneven stands in some plots due to the drought.

scholarly journals Foliar Sprays to Control Insects on Spring Peppers, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 137-137
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Eastern Shore ◽  
Foliar Sprays ◽  
Marketable Fruit ◽  
Extension Center

Abstract Peppers were transplanted on 22 May at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25ft rows, planted on 3ft row spacing. Plots were separated from each other by an untreated guard row. Each treatment was replicated 4 times in a RCB design. Treatments were applied with a 3 nozzle boom backpack sprayer delivering 60 gal water/acre at 40 psi. Treatments were applied weekly beginning 19 Jul through 16 Sep. The aphidicides CGA 215944 and Provado were added to the pyrethroid treatments indicated in the table on 1,8, and 16 Sep after GPA populations had built up. Spod X was added to the Pounce treatments on the last four application dates to control BAW. The gallonage was increased to 73 gpa for the last 3 applications due to the growth of the plants. Evaluation criteria consisted of hand-harvests of market sized fruits from the more uniform row of each 2 row plot on the dates indicated in the table. This fruit was graded to remove any ECB or BAW damaged fruit and the remaining marketable fruit was weighed to determine yields. Numbers of GPA on 5 randomly picked leaves/plot were counted on the dates indicated in the table.

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