Insecticides For Aphid Control Research Articles

Control of Aphids in Cotton in Mississippi, 1985

Abstract A small plot field study was conducted to measure the relative efficacy of several insecticides for control of aphids on cotton in the Delta region of MS. Since the species of aphids was not determined, we assumed that the population was predominantly composed of Aphis gossypii. The study was conducted on a grower farmer where aphids were found at measurable severs. According to the grower the field had previously been treated several times with pyrethroid insecticides. Plot size was 4 rows × 50 ft. Applications were applied with a John Deere high clearance sprayer equipped with 2 TX-4 nozzles/row that delivered a spray volume of ca. 3.0 gpa. Each treatment was replicated 4 times in a randomized complete block design. Pretreatment observations indicated that the aphid population was between 10-20 aphids/upper leaf. Posttreatment observations were made by randomly collecting 10 leaves from the upper, mid, and lower canopy levels in each plot at 2, 7, and 14 days after application. Each collected leaf was classified as having (1) 0 aphids, (2) 1-5 aphids, (3) 6-15 ;iphids, (4) 16-25 aphids, or (5) 25+ aphids. For purposes of comparing the various treatments, the data were converted to estimated number of aphids/leaf by multiplying the mid-point of each classification by the number of observations for that classification. Data were subjected to AOV and means were separated by Duncan’s multiple range test.

Control of Green Peach Aphid on Tobacco, 1983

Abstract Thiodan and malathion dusts, standard insecticides for aphid control on tobacco in this region, were compared with three formulations of acephate. Tobacco plants grown from seed in multipot trays, were transplanted on 22 Jun. to a field of Merrimac sandy loam on the Valley Laboratory farm. Cultural practices throughout the growing season were standard for cigar binder tobacco with plants 24 in. apart in rows that were 39 in. apart. Each plot consisted of seven plants in a single row with a border row between each plot. Each randomized treatment was replicated four times. Insecticides were applied 8 Sep. when the aphid population appeared vigorous and more or less uniformly covering the test area. Acephate 75 SP combined with pecanshell meal to make a dust, and the malathion and thiodan dusts were applied with a Chapin handcranked duster. The acephate liquid formulation was applied with a Solo backpack sprayer using a cone nozzle and 20 lb/in2. The acephate mist treatment was applied with a knapsack KWH power-driven mist blower. For the post-treatment count, taken on 14 Sep., all stages of aphids were recorded in three 4.7cm circles (leaf tip, middle and base) on the lower surface of two leaves from each of two plants in every plot.

Soil Treatments of Experimental Insecticides for Control of Aphids and Colorado Potato Beetles on Potatoes, 1981

Abstract The soil type for this experiment was a Ritzville silt loam, Mesic Calciorthidic HaploxerolIs, with a pH of 6.2 and organic matter of 1.6%, at Yakima, Washington. The soil was prepared for planting the week of Apr 13-17. Eptam herbicide was applied over the entire experimental area. The plots were treated and planted with Russet Burbank potatoes on Apr 23. The the preplant broadcast (PPBC) treatments the insecticide granules were applied with a cyclone seeder applicator and then the granules were worked into the top 6 inches of soil with a rototiller. For the planting time furrow (PTF) treatments the insecticide granules were dribbled through a hand-held, funnel-type applicator into the open furrow over the potato seed pieces and then the seed and granules were covered with soil. Each treatment was replicated 4 times in a randomized complete block design. Each plot was 2 rows (34 inches) wide and 10 ft long (1.72 m wide and 5.78 m long).

Control of the Green Peach Aphid on Potatoes with Soil Systemic Insecticides: Preplant Broadcast and Planting Time Furrow Applications, 1973–77212

Systemic insecticides were evaluated as preplant broadcast and planting time furrow applications for control of Myzus persicae (Sulzer) on ‘Russet Burbank’ potatoes. Aldicarb and thiofanox were equally effective for control of aphids with both application methods, and these were more effective than disulfoton, phorate, or carbofuran. Bay Hox 3298, ( O, S dimethyl\[(dimethylamino)methy]ene]phosphoramidothioate), and aldoxycarb showed promise as systemic insecticides for control of aphids on potatoes. Acephate, FMC 27289, (2,3-dihydro-2,2-dimethyl-7-benzofuranyl[methy]\] \[(dipropylamino)thio\]methylcarbamate), and FMC 35001, (2,3-dihydro-2,2-dimethyl-7-benzofuranyl[(dibuty]amino)thio]methylcarbamate), showed some systemic activity against the green peach aphid on potatoes but not enough to be considered in an aphid control program on potatoes in eastern Washington.

Incidence and Severity of Barley Yellow Dwarf on Wheat Treated with Systemic Insecticides for Aphid Control, 1978

Abstract Two systemic insecticides, Thimet 15G and Di-Syston 15G were applied with a Gandy applicator in the furrow at seeding time on Oct 7’77. A randomized-block was used with individual plots 6.4 m by 21.3 m. Each treatment was replicated 4 times. Foliage disease symptoms were taken when the disease was most severe in late May of 1978. Di-Syston 15G and Thimet 15G treatments both gave significant reductions in foliage disease symptoms and increased grain yields over the untreated check plots.

Furrow Application of Systemic Insecticides for Control of Aphids and Beetles, Yakima, Washington, Tests 2 and 3, 1977

Abstract ‘Russet Burbank’ potatoes were planted in open furrows on April 20, 1977, in Ritzville silt loam soil at Yakima, Washington. Plots were 2 rows wide, 1.72 m, and 15.2 m long. On the same day the granular insecticides were dribbled through a hand-operated, funnel-type applicator over the potato seed pieces, and the sprays of the emulsifiable concentrates were applied in 187 liters of spray/ha over the seed with a CO2 sprayer; then the seed pieces were covered with soil. The treatments were replicated 3 times in a randomized complete block design. The crop was sprinkler-irrigated: 38 cm of water was applied between May and September. Aphid counts were made from 20 compound potato leaves/plot in June and from 15 compound potato leaves/plot in July. The percent of plants damaged by the Colorado potato beetle was recorded on July 7, 18, and August 19. The data were subjected to analysis of variance with Duncan’sMultiple Range Test.

Systemic Insecticides for Aphid Control in Garden Lily Production1

Granular Di-Syston® ( O,O -diethyl S -[2-ethylthio)ethyl] phorodithioate) and phorate were applied over garden lily bulbs in the planting furrow at the rates of 2 and 4 lb. actual Di-Syston and 8 and 12 lb. actual phorate per acre. All treatments gave complete control of the potato aphid, Macrosiphum euplwrbiae (Thomas), and the aphid Acyrthosiphon solani (Kaltenbach) during the period of infestation. Average bulb weight of 6 varieties treated with 2 lb. of Di-Syston was 87% that of the untreated checks compared to 72% for 8 lb. of phorate.

Systemic Insecticides for Control of Aphids on Field-Grown Easter Lily1

At Harbor, Oregon, season-long protection of field-grown lily plants from aphid attack has been obtained from applications over bulbs in the furrow of granulated phorate and Di-Syston® (O,O -diethyl S -2-(ethylthio)ethyl phosphorodithioate). Mixing granules in the soil before setting the bulbs was also effective, as well as applying carbon dust formulations directly to the bulbs. Soaking bulbs in dilute emulsions or demeton, phorate, or Di-Syston was effective to a lesser degree. Chiefly involved were the foxgrove aphid (Myzus solani (Kitb,)), the melon aphid (Aphis gossypii Glov), and the western lily aphid (Macrosiphum, scoliopi Essig). The shallot aphid (Myzus ascloonicus Doncaster), the potato aphid (Myzas cuphobiae (Thomas)), and the green peach aphid (Myzus persicae (Sulz) appeared in small numbers.