Matteson, Nancy A.

Stoltz, Robert L.

Undetermined

ScholarsArchive@OSU

Section VIIForage & Seed InsectsCOLORADO POTATO BEETLE AND GREEN PEACH APHID CONTROL WITHSOIL APPLIED INSECTICIDES AND FOLIAR SPRAYS, 1998R. L. Stoltz and N. A. MattesonUniversity of Idaho, Twin Falls R & E CenterP. O. Box 1827, Twin Falls, ID 83303-1827208/736-3600bstoItz@uidaho.edu,nmatteson@uidaho.eduExperimentalplots were established on the UI Research and ExtensionCenter, Kimberly, Idaho.Potatoes were planted on 30 Apr and irrigated by solid set sprinkler. The soil type was Portneufsilt loam. Eleven treatments and one untreated check plot were replicated four times in a RCBdesign. Individual plots were 4 rows (36 inch row spacing) wide by 25 ft long with 5 ftalleyways separating the plots. Green peach aphids were mass reared on greenhouse mustardplants ('Chinese Cabbage') for release into individual plots. Aphid releases were made into testplots on 17 Jun and 26 Jun. A total of four heavily infested leaveswere released per plot. On aweekly basis, adults, large larvae (3-4 instar), small larvae (1-2 instar), and egg masses ofColorado potato beetle were counted and percent defoliation estimates were made from wholeplant inspections of the center 5 hills of the middle 2 plot rows. Greenpeach aphid counts weremade from non-destructively sampling 20 leaves at random from the top, middle and bottomsections of plants in the center two rows of each plot. The data collected and presented is thetotal no. of aphids per 20 leaves sampled. Two Admire treatments were applied at planting in-furrow over the seed piece on 30 Apr. Temik, Furadan and Thimetwere applied in furrow withthe seed piece also at planting. The post-emergence Admire treatments were side-dress, shankapplied on 1 Jun. Furadan was applied as a 6 in banded S overthe plants at 3 inch rosette stageof plant growthon 5 Jun andProvadowas applied in a broadcast S overthe plantson 1, 8, and 15Jun within a day of Bravo fungicide applications. Alert was applied as a broadcast over theplants on 22 Jun. Monitor® was applied (1 lb Al/acre) on 15 Jul as a S to the Temik, Furadan,andThimet plots. All foliar treatment sprays were applied using the backpack C02 sprayer at arate of 20 gpa (30 psi, with 4, 10X hollow cone nozzles). Data were analyzed using ANOVAand Studentized-Tukeys multiple means comparison.There was no significant impact on adult CPB by any insecticide until 27 Jul when all treatmentsshowed reduced larval numbers from the untreated check. There was significant reduction oflarge larvae numbers with all treatments except with Thimet + Alert on 27 Jul. Similar resultswere obtained for the reduction of small larvae, except with Furadan and Thimet on 13 Jul andThimet on 27 Jul. There was no significant effect of any treatment on thenumber of egg massesobserved. Therewas a significant reduction in the amount of defoliation by all treatments fromthe untreated checkduring the entire study period. Green peachaphid numbers remained low inall Admire and Provado treatment plots throughout the study period. There were significantlyhigher numbers of aphids than the other insecticide treatments in the New Leaf and Thimet +Alert treatment plots on 27 Jul. There was no significant difference in total yield weights atharvest. There was a significant increase in the yield weight of Large #1 potatoes by multipleProvado sprays. There was a greater percentage of total yield weight in Small #1 potatoes(36.4%), with Large #1 potatoes second in percentage of the total yield weight (20.9%). Large131#2, Small #2 and Culls were third, fifth and fourth, respectively, in percentage of total yieldweight (15.3%, 13.4% and 14.0%).Treatment/ Rate(lb Al/acre)ApplicationMethodCPB Adultsformulation Jun 30 Jul 6 Jul 13 Jul 20 Jul 27Check 5.8 c 3.5 ab 1.5 ab 0.3 a 192.3 bTemik 3.00 IFAP 4.3 abc 5.5 ab 3.0 b 0.0 a 18.5 aAdmire 0.24 IFAP 1.3 ab 1.5 ab 0.0 a 0.0 a 0.5 aAdmire 0.30 IFAP 1.3 ab 1.3 ab 0.8 ab 0.3 a 0.3 aAdmire 0.24 PESD 2.0 abc 1.5 ab 0.8 ab 0.0 a 0.3 aAdmire 0.30 PESD 1.8 abc 1.0 a 0.3 a 0.5 a 0.0 aFuradan 3.00 IFAP 5.5 be 6.8 b 1.5 ab 0.0 a 19.5 aFuradan 3.00 PES 0.3 a 1.5 ab 0.8 ab 0.0 a 0.5 aThimet 3.00 IFAP 1.5 abc 1.3 ab 0.3 a 0.0 a 15.8 aNew Leaf 3.0 abc 2.5 ab 1.8 ab 0.0 a 1.0 aProvado 0.05 PES 0.3 a 0.0 a 0.3 a 0.0 a 1.5 aThimet + Alert 3.00 + 0.15 IFAP + PES 0.8 a 0.8 a 0.3 a 0.0 a 8.8 aMeans within a column with the same letter are not significantly different (P = 0.05, Studentized-Tukeys).IFAP = in furrow at planting; PESD= post emergence side dress; PES = post emergence spray.Treatment/ Rate(lb Al/acre)ApplicationMethodCPB Large Larvaeformulation Jun 30 Jul 6 Jul 13 Jul 20 Jul 27Check 0 85.0 b 182.3 b 4.8 a 25.0 bTemik 3.00 IFAP 0 21.8 a 35.0 a 0.8 a 0.5 aAdmire 0.24 IFAP 0 0.0 a 0.0 a 0.0 a 0.3 aAdmire 0.30 IFAP 0 0.0 a 0.0 a 0.0 a 0.0 aAdmire 0.24 PESD 0 1.3 a 0.0 a 0.0 a 0.0 aAdmire 0.30 PESD 0 0.3 a 0.5 a 0.0 a 0.0 aFuradan 3.00 IFAP 0 21.5 a 32.8 a 0.0 a 0.8 aFuradan 3.00 PES 0 0.0 a 0.0 a 0.0 a 0.0 aThimet 3.00 IFAP 0 4.8 a 11.8a 0.0 a 2.5 abNew LeafProvado000.0 a0.0 a0.0 a0.0 a0.0 a0.0 a0.0 a0.0 a0.05 PESThimet + Alert 3.00 + 0.15 IFAP + PES 0 3.0 a 1.3 a 0.0 a 23.5 bMeans within a column with the same letter are not significantly different (P = 0.05, Studentized-Tukeys).IFAP = in furrow at planting; PESD = post emergence side dress; PES = post emergence spray.132Treatment/ Rate(lb Al/acre)ApplicationMethodCPB Small Larvaeformulation Jun 30 Jul 6 Jul 13 Jul 20 Jul 27Check 109.3 b 135.8 b 91.0 c 1.8 b 10.0 bTemik 3.00 IFAP 11.0 a 34.5 a 24.0 ab 0.3 a 1.0 aAdmire 0.24 IFAP 0.0 a 1.0 a 0.5 a 0.0 a 1.0 aAdmire 0.30 IFAP 0.3 a 0.0 a 0.0 a 0.0 a 0.0 aAdmire 0.24 PESD 12.8 a 3.0 a 1.0 a 0.0 a 0.0 aAdmire 0.30 PESD 0.3 a 0.8 a 0.0 a 0.0 a 0.0 aFuradan 3.00 IFAP 12.3 a 25.5 a 61.3 be 0.0 a 1.3 aFuradan 3.00 PES 4.5 a 0.0 a 1.5 a 0.0 a 0.5 aThimet 3.00 IFAP 2.8 a 8.0 a 24.3 ab 0.5 a 3.0 abNew LeafProvado0.3 a16.0 a0.0 a3.3 a0.8 a0.0 a0.0 a0.0 a0.0 a0.0 a0.05 PESThimet + Alert 3.00 + 0.15 IFAP + PES 5.0 a 10.8 a 4.8 a 0.0 a 0.0 aMeans within a columnwith the same letterare not significantly different (P = 0.05, Studentized-Tukeys).IFAP = in furrow at planting; PESD= post emergence side dress; PES = post emergence spray.Treatment/ Rate(lb Al/acre)ApplicationMethodCPB Egg Massesformulation Jun 30 Jul 6 Jul 13 Jul 20 Jul 27Check 7.5 a 5.3 a 3.0 ab 0.0 a 0Temik 3.00 IFAP 4.0 a 7.0 a 3.5 ab 0.3 a 0Admire 0.24 IFAP 0.8 a 0.5 a 0.0 a 0.0 a 0Admire 0.30 IFAP 0.5 a 0.5 a 0.0 a 0.0 a 0Admire 0.24 PESD 0.5 a 0.0 a 0.0 a 0.0 a 0Admire 0.30 PESD 1.5 a 1.8 a 0.0 a 0.0 a 0Furadan 3.00 IFAP 7.0 a 5.3 a 5.0 b 0.3 a 0Furadan 3.00 PES 0.0 a 0.5 a 0.0 a 0.5 a 0Thimet 3.00 IFAP 2.8 a 4.0 a 1.3 ab 0.0 a 0New Leaf 0.0 a 0.3 a 0.3 a 0.0 a 0Provado 0.05 PES 5.3 a 0.5 a 0.0 a 0.0 a 0Thimet + Alert 3.00 + 0.15 IFAP + PES 3.5 a 0.8 a 0.8 a 0.0 a 0Meanswithina column withthesame letterarenot significantly different (P= 0.05, Studentized-Tukeys).IFAP= in furrow at planting; PESD = postemergence side dress; PES= post emergence spray.133Treatment/ Rate(lb Al/acre)ApplicationMethod% Defoliationformulation Jun 30 Jul 6 Jul 13 Jul 20 Jul 27Check — 0 16.3 c 38.8 b 10.3 b 60.0 bTemik 3.00 IFAP 0 3.8 b 3.8 a 3.0 a 16.3 aAdmire 0.24 IFAP 0 0.0 a 0.0 a 0.0 a 0.0 aAdmire 0.30 IFAP 0 0.0 a 0.0 a 0.0 a 0.0 aAdmire 0.24 PESD 0 0.5 ab 0.0 a 0.0 a 0.0 aAdmire 0.30 PESD 0 0.0 a 0.0 a 0.0 a 0.0 aFuradan 3.00 IFAP 0 3.5 ab 9.0 a 4.0 a 13.5 aFuradan 3.00 PES 0 0.0 a 0.0 a 0.0 a 1.3 aThimet 3.00 IFAP 0 1.5 ab 1.0 a 0.3 a 7.5 aNew Leaf 0 0.0 a 0.0 a 0.0 a 0.0 aProvado 0.05 PES 0 0.0 a 0.0 a 0.0 a 0.0 aThimet + Alert 3.00 + 0.15 IFAP + PES 0 1.0 ab 0.5 a 0.0 a 2.5 aMeans within a column with the same letter are not significantly different (P = 0.05, Studentized-Tukeys).IFAP = in furrow at planting; PESD = post emergence side dress; PES = post emergence spray.Treatment/ Rate(lb Al/acre)ApplicationMethodNo. GPA per 20 leavesFormulation Jun 22 Jun 30 Jul 6 Jul 13 Jul 20 Jul 27 Aug 3Check 14.0 ab 8.0 a 26.5 ab 27.5 a 38.5 a 25.3 ab 3.0 aTemik 3.00 IFAP 6.0 ab 9.5 a 21.5 ab 37.3 a 0.8 a 0.0 a 0.5 aAdmire 0.24 IFAP 2.3 a 7.0 a 0.5 a 0.0 a 0.0 a 0.0 a 0.5 aAdmire 0.30 IFAP 4.3 ab 2.8 a 0.0 a 0.0 a 0.3 a 0.3 a 0.0 aAdmire 0.24 PESD 17.0 ab 10.3 a 7.3 ab 3.0 a 0.5 a 0.0 a 0.0 aAdmire 0.30 PESD 5.0 ab 4.3 a 6.8 ab 0.0 a 5.0 a 0.0 a 0.0 aFuradan 3.00 IFAP 24.0 b 13.5 a 34.8 ab 68.0 a 0.0 a 0.0 a 0.0 aFuradan 3.00 PES 15.3 ab 11.3 a 40.5 ab 146.0 b 11.0a 0.3 a 0.3 aThimet 3.00 IFAP 12.8 ab 11.3 a 45.5 b 47.0 a 1.3 a 0.0 a 0.0 aNew Leaf 14.5 ab 7.8 a 20.0 ab 40.0 a 45.5 a 35.8 b 11.3 aProvado 0.05 PES 14.5 ab 3.0 a 0.0 a 0.0 a 0.8 a 0.0 a 0.3 aThimet + Alert 3.00 + 0.15 IFAP + PES 9.0 ab 7.0 a 24.5 ab 31.5 a 36.8 a 34.3 b 5.0 aMeans within a column with the same letter are not significantly different (P = 0.05, Studentized-Tukeys).IFAP = in furrow at planting; PESD = post emergence side dress; PES = post emergence spray.134Treatment/ Rate(lb Al/acre)ApplicationMethodYield weights (lb per 25 row ft)formulation Large #1 Small #1 Large #2 Small #2 Culls TotalCheck 6.1a 21.9a 4.0 a 7.1a 12.1a 51.2 aTemik 3.00 IFAP 13.2 ab 22.3 a 10.0 a 12.6 a 10.0 a 68.2 aAdmire 0.24 IFAP 13.8 ab 21.4 a 10.5 a 7.2 a 8.6 a 61.5 aAdmire 0.30 IFAP 17.5 ab 29.1a 10.9 a 8.2 a 9.3 a 74.9 aAdmire 0.24 PESD 17.0 ab 26.5 a 11.4 a 12.2 a 11.9a 79.0 aAdmire 0.30 PESD 14.5 ab 21.0 a 9.7 a 10.0 a 7.6 a 62.7 aFuradan 3.00 IFAP 11.2 ab 23.4 a 15.0 a 10.3 a 9.7 a 69.5 aFuradan 3.00 PES 13.1 ab 26.9 a 10.9 a 9.7 a 9.6 a 70.2 aThimet 3.00 IFAP 14.6 ab 22.2 a 11.3 a 8.8 a 9.6 a 66.5 aNew Leaf — 15.5 ab 28.4 a 12.6 a 10.1a 8.6 a 75.2 aProvado 0.05 PES 18.6 b 26.2 a 10.4 a 6.2 a 9.1a 70.4 aThimet + Alert 3.00 + 0.15 JJAP + PES 15.6 ab 27.3 a 8.1a 7.1a 8.0 a 66.1aPercent ofTotal Yield 20.9 36.4 15.3 13.4 14.0Means within a column with the same letter are not significantly different (P = 0.05, Studentized-Tukeys).IFAP = in furrow at planting; PESD = post emergence side dress; PES = post emergence spray.135

Colorado Potato Beetle and Green Peach Aphid Control with Soil Applied Insecticides and Foliar Sprays, 1998

https://ir.library.oregonstate.edu/downloads/mg74qr99p

Colorado Potato Beetle and Green Peach Aphid Control with Soil Applied Insecticides and Foliar Sprays, 1998

Abstract

Similar works

Full text

Available Versions

ScholarsArchive@OSU