The use of disorientation of the plum moth in the conditions of chemical protection of the orchard

Disorientation of the plum moth (Grapholita funebrana Treitschke) under the conditions of chemical protection of the garden was carried out using dispensers (Z8DDA, 16.7 mg) produced by ZAO Shchelkovo Agrokhim. Dispensers were placed at a tree trunk at a height of 1.5 - 2 m with an application rate of 500 per hectare. The study was carried out on three plots of a 1 ha plum orchard: a plot with chemical treatments and with disorientation, an area with chemical treatments, without disorientation, and an area without chemical treatments and without disorientation. The effectiveness of disorientation at a high abundance during the flight peaks of the second and third generations of the pest ranged from 100 % to 92-93 %. The effectiveness of disorientation, together with the chemical protection of the garden in comparison with untreated area, showed higher results - in the first two months, the efficiency ranged from 100 to 98 %, and during the periods of the 2nd and 3rd flight peaks of the pest (with a flight intensity of 136 - 120 individuals per trap) did not fall below 96 %.

Deposition of ultrasonic nebulized aerosols onto a hydrophilic surface

The effect of chemical treatment of a metallic substrate on the deposition of aerosols generated by an ultrasonic nebulizer was investigated. A single substrate with areas having different “level” of hydrophilicity (or hydrophobicity) was used as a model surface. The treated (more hydrophilic) area became more negatively-charged based on a surface electric potential meter. A low-pressure analysis method (electron-microscope image) and ordinary pressure methods (Raman spectroscopy and X-ray fluorescence) analytical results indicated that in comparison with the untreated area, the treated area trapped more particles in the case of the deposition of “wet” aerosols. In the case of the deposition of more “dry” aerosols, the untreated area trapped more particles rather than that of the treated one. The efficiency of particles deposition not only depended on the degree of hydrophilicity (or hydrophobicity) of the surface but also due to the conditions (wet or dry) of incoming aerosols.

Carrying Capacity Estimation of Herbicide-Treated and Untreated Palm Oil Plantation for Bali Cows

This study aims to estimate the carrying capacity of oil palm plantations with the use of herbicides based on the forage availability for Bali cows. The research was performed in palm oil plantation owned by PTPN V Riau, from March 2016 until March 2017. The parameters observed were 1) Forage production that grows between palm trees at 6 weeks cutting age. The forage sample was taken from 5 point of 1x1m2, then subjected to proximate analysis. Data were analyzed with one-way random design, 2) Forage consumption; obtained by observation of 5 pregnant Bali cow and 7 non-pregnant for seven consecutive days 3). Estimated carrying capacity for Bali cows, obtained from the calculation of forage production (/ha/year) divided by forage consumption. The result of the research showed that 1). The production of dry matter (DM) forage in herbicide-treated areas was 689.55 kg/ha/year, not significantly different compared to untreated areas (622.33 kg/ha/year). Crude protein (CP) forage content of forage obtained from herbicide-treated area was significantly higher (p<0.05) than untreated area, whereas the total content of DM and total digestible nutrients (TDN) was not significantly different. DM consumption of pregnant Bali cow was on average 3.68±0.29 kg/head/day or 1,343.20±105.85 kg/head/year and non-pregnant 4.02±0.36 kg/head/day or 1,467.30±131.4 kg/head/year. The estimated carrying capacity on herbicide-treated (0.51 head of pregnant cow/ha), did not show any significant difference compared to untreated area (0.46 head/ha). For non-pregnant, the carrying capacity of herbicide-treated area (0.47 head/ha) was not different with non-treated area (0.42 head/ha). It was concluded that the use of herbicide on palm oil plantation had no effect on the carrying capacity of the Bali cow.

Effects of chaining and burning in Acacia ramulosa shrublands of the Peron Peninsula, Shark Bay, Western Australia

We tested the effect of chained and burnt buffers installed across the Peron Peninsula at Shark Bay, Western Australia, in 1995 on the plant communities. Chaining modified fuel by flattening shrubs to provide a more continuous fuel bed by adding vertically arranged shrub fuel to the in situ sparse ground fuels. Twenty-six, 10 × 10-m permanent plots were established in the treated buffers and adjacent untreated shrubland. Plots were evaluated in 1996, 2001 and 2008. By 1996, fire and chaining had promoted a suite of species that included 29 not observed in adjacent untreated shrubland. High rainfall before the 2001 assessment produced an increase in species richness in both burnt and unburnt treatments. By 2008, 20 of the 29 fire-promoted species were found in the untreated area after rainfall leaving nine species uniquely responsive to the fire and chaining treatment. The Acacia ramulosa W.Fitzg. sandplain communities in our study area appear to be sustained by high rainfall years promoting regeneration of 84% of species with a smaller proportion (16%) regenerated only in burnt areas. The dominance of periodic rainfall in promoting regeneration led to the likely reduced effectiveness of the fire buffers in preventing the spread of fire. There is the potential for extensive fires in this landscape following favourable rainfall.

Corn Earworm and European Corn Borer Control with Insecticides, 1997

‘Golden Queen’ sweet corn was seeded on 22 I Apr near Calabash, NC in Brunswick Co. Single-row plots, 10 ft long on 42-inch centers, were replicated 4 times in a RCB design. Alleys of 5 ft were used I between replicates. Treatments were applied with a CO2-pressurized backpack sprayer using a single hollow-cone nozzle (18X) operating at 60 psi to deliver 54.5 gpa. Test 1 and Test 2 were in the same field with a 75 ft spacing of untreated area between the two test sites. Applications were made to both Test 1 and Test 2 twice a week on 27 and 30 Jun, and 3, 7, 10, 14, and 17 Jul. Insect-damaged ears were assayed on 21 Jul when all ears were harvested from both tests.

Control of aspen poplar, balsam poplar, prickly rose and western snowberry with metsulfuron-methyl and 2,4-D

Aspen poplar, balsam poplar, prickly rose and western snowberry species grow together in pastures of the aspen parkland and reduce the grass and forb production available for grazing. Two 7-yr studies were conducted in east central Saskatchewan to evaluate metsulfuron-methyl (metsulfuron), 2,4-D and a mixture of metsulfuron + 2,4-D for the long-term control of these woody species. Metsulfuron applied at 60 g a.i. ha−1 effectively controlled the four woody species for 7 yr. Control was not improved when 2,4-D at 2 kg a.i. ha−1 was added to the 60 g ha−1 rate of metsulfuron. Aspen poplar control was improved when sucker regrowth was 2-yr old rather than 3-yr old. Grass and forb production was increased 50% from 1023 kg ha−1 in the untreated areas to 1619 kg ha−1 following application of 60 g ha−1 metsulfuron in two experiments averaged over 5 yr. Forbs production decreased from 44% on the untreated area to 8% on areas treated with metsulfuron. Key word: Aspen poplar, balsam poplar, prickly rose, western snowberry, metsulfuron-methyl, 2,4-D

Chemical Evaluations for Control of Japanese Beetle on Grapes, 1995

In an experimental ‘Clinton’ vineyard at Wooster, Ohio, plots consisted of 2 grape vines, with 4 replications per treatment in a randomized block design. Treatments were applied as foliar sprays at a rate of 100 gpa (935 liter/ha) on 18 Jul. A hand-held CO2 sprayer operating at 45 psi (3.2 kg/cm2), equipped with a 9505-E-TeeJet nozzle, was used to apply treatments. No surfactant was added to any of the treatments. On 18 Jul, after treated foliage was dry, 5 grape leaves were removed from the outside canopy of each plot for use in the bioassay. Leaves were brought into the lab on 0, 1, 3, and 6 d after initial treatment and placed in round 1-gal. ice cream containers along with 10 Japanese beetles. The beetles used in these studies were collected in traps in an untreated area. The 1-gal containers were modified by placing plastic liners inside and cheesecloth over the open top. Beetles were confined in the cages with the treated foliage for 24 h after which the number of dead beetles was determined.

Maggot Control, 1995

Materials were applied on 26 Jul to 75- by 75-ft plots in a bearing blueberry field at Jonesboro, Maine. There was 1 replication of each treatment, applied at a rate of 20 gpa using a CIMA P55D Atomizer Low Volume sprayer mounted on a Agco Allis 6670 tractor operating at 40 psi and driven at 1.8 mph. At treatment, 30 to 40% of the berries were ripening and turning blue. On 10 Aug, 1 qt of berries was raked from each of 6 systematically selected areas within each treated and untreated area and at least 20-ft from plot boundaries. Berries were refrigerated and processed within 3 d by boiling the berries and extracting the maggots from the pulp. Temperatures in July were generally warm with less than adequate rainfall.

Early Season Application of a Baculovirus for Area-Wide Management of Heliothis/Helicoverpa (Lepidoptera: Noctuidae): 1992 Field Trial

A 9.6-km diam area in the intensive cotton-growing region of the Mississippi Delta was treated with an entomopathogenic virus to determine the effect on populations of adult tobacco budworms, Heliothis virescens (F.), and bollworms, Helicoverpa zea (Boddie), emerging from early season weed hosts. Four aircraft were used to treat ≈ 7,106 ha during 24–28 April at a rate of 100 larval equivalents per ha. Emergence data from cages placed over treated and untreated areas indicated that virus treatments reduced tobacco budworm emergence by 80.6% and bollworm emergence by 46.2%. During the emergence period, tobacco budworm traps in the area surrounding the treated area averaged 11.4 moths per trap per night. Average trap capture per trap per night in the center (6.4 km diam) of the treated area was 6.4 moths, a reduction of 43.9% compared with the untreated area. Correspondingly, reduction in trap counts for bollworm in the center was 21% when compared with the untreated area.

Response of Yankeeweed (Eupatorium compositifolium) and Associated Pasture Plants to Herbicides

Eleven herbicides applied in May, were evaluated for yankeeweed control in East-Central Texas. Yankeeweed cover 1 yr later was reduced to 5% or less by 0.28 kg ha-1 of picloram; 0.56 kg ha-1 of clopyralid, glyphosate, or dicamba; 0.28 + 0.84 kg ha-1 of dicamba + 2,4-D, and 1.1 kg ha-1 triclopyr compared with 30% cover in the untreated area. Chlorsulfuron and metsulfuron at 0.07 kg ha-1 reduced yankeeweed cover to 12 and 7%, respectively. Dalapon, 2,4-D, and tebuthiuron were relatively ineffective. Most herbicides, reduced woolly croton cover within 1 mo after treatment compared to the untreated areas, but 2,4-D at 0.28 kg ha-1 and chlorsulfuron at 0.02 kg ha-1 and 0.07 kg ha-1 were most effective after 4 mo. All herbicides, except dalapon at 1.1 kg ha-1 or less and most rates of 2,4-D and tebuthiuron, reduced partridgepea cover during the year of application. Total grass cover was increased 4 and 12 mo following treatment with clopyralid, picloram, dicamba, and triclopyr. On separate sites, bahiagrass and coastal bermudagrass accounted for most of the increased grass cover.