Generación de tecnologías para incrementar la productividad del algodón Gossypium hirsutum L. en Manabí, Ecuador

Cañarte, Ernesto; Sotelo-Proaño, Rafael; Cedeño, José Bernardo Navarrete

doi:10.29076/issn.2528-7737vol13iss33.2020pp85-95p

Cited by 5 publications

(10 citation statements)

References 7 publications

(12 reference statements)

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“…While in plots treated with lambda cyhalothrin + thiamethoxam, 1 to 2 individuals plant -1 were observed, under untreated plot, the number of individuals increased from 5 to 11 (Figure 6), resulting significantly higher than this last treatment (Table 2). The results are similar to those reported by Cañarte-Bermudez et al (2020) who for the same area and months of evaluation reported a high incidence of Dysdercus spp. associated with the fiber formation stage.…”

Section: The Cotton Strainers Dysdercus Sppsupporting

confidence: 91%

“…Of these, Coleomegilla maculata De Geer together with Zelus sp., were the most abundant species (Table 3). The latter species of predators had previously been reported in the area (Cañarte-Bermudez et al, 2020). The results showed a significantly lower number of predators in treated plants with lambda cyhalothrin + thiamethoxam (Table 3).…”

Section: Predatorssupporting

confidence: 65%

“…This species had not been mentioned feeding on cotton plants in Ecuador. In fact, a previous investigation, only reported another genus of thrips (Frankliniella) but without determining the species (Cañarte-Bermudez et al, 2020). A low number of T. palmi individuals was found on leaves, which showed no significant differences between treated and untreated plants (Table 2).…”

Section: The Thrips Thrips Palmimentioning

confidence: 87%

“…The population levels detected (ranging from 0.02 to 0.2 larvae leaf -1 , Table 2) were very similar to those obtained by research performed in the same area that used chemical insecticide to managing. Cañarte-Bermudez et al (2020) pointed out general averages of 0.48 individuals leaf -1 spraying lambda cyhalothrin + thiamethoxam, azadirachtin, abacmectin and cypermethrin. However, this species represents an important pest on cotton crops in other regions (Gil and Lopez, 2017).…”

Section: The Thrips Thrips Palmimentioning

confidence: 99%

“…In Ecuador, cotton played an important role in the agricultural sector as part of the edible oil industry from the 1970s to the 1990s (FAO, 2017). It is currently grown for the textile industry, mainly in the provinces of Guayas and Manabí, with a sowing area of approximately 1,800 ha (Cañarte-Bermudez et al, 2020) and an estimated fiber production of 1,200 tons (FAOSTAT, 2019). As in other latitudes, a wide variety of organosynthetic pesticides are used in this country for pest control (FAO, 2017).…”

mentioning

confidence: 99%

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Side Effects of Lambda Cyhalothrin and Thiamethoxam on Insect Pests and Natural Enemies Associated with Cotton

Zambrano¹,

Arteaga²,

Velasquez³

et al. 2021

SJA

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T he genus Gossypium (Malvaceae) comprises of 40 species, among which four are commercially cultivated. One of the latter, the upland cotton, Gossypium hirsutum L., predominates with 95% of the total production area (FAO, 2015;Trapero et al., 2016). It is grown mainly to obtain fiber as a raw material for the textile industry (FAO, 2015). In 2019, 82,589,031 tons of cotton were produced from approximately 38,640,608 hectares (FAOSTAT, 2019) cultivated in more than 78 countries (Razaq et al., 2020). This represents 2.3% of all cultivated land in the world and indicates its economic and social importance (FAO, 2015).Until the end of the 19th century, there were few cases of pests associated with cotton (Razaq et al., 2020). However, the large number of hectares planted in different biogeographic regions, resulted in the insertion of a variety of arthropod species within the trophic networks of the agroecosystem, which expanded the diversity of these organisms, compared to what was originally found in center of origin (Naranjo, 2011). There are currently 1,300 species of phytophagous arthropods associated with cotton, Abstract | Cotton (Gossypium hirsutum) is cultivated mainly for the production of fiber for the textile industry and is attacked by different insect pests, therefore it is produced with frequent pesticide applications. Research was conducted to evaluate the effect of lambda cyhalothrin + thiamethoxam on the incidence of insect pests and its associated natural enemies. Results revealed that populations of B. tabaci were higher in plots treated with lambda cyhalothrin + thiamethoxam associated with low levels of parasitism. Further, A. gossypii were high and their parasitism low, in both treated and untreated plots. Individuals of T. palmi, B. thurberiella, H. virescens and A. vestitus were low in the treatments; while individuals of Dysdercus spp. were lower in the plots treated with the chemical insecticide. However, the predators, Coleomegilla maculata, Cycloneda sanguinea, Cheilomenes sexmaculata and Zelus sp., were inferior in the treated plots. Yield ranged from 1.2 to 1.4 tons. Thrips palmi is first reported feeding on cotton in Ecuador. The results showed high populations of B. tabaci in the chemical treatment, and its suppressive effect on the beneficial entomofauna. Future research should focus on evaluating the selective applications of some insecticides to control A. gossypii and Dysdercus spp. infestations that impact as little as possible on non-target organisms such as parasitoids and predators.

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Section: The Cotton Strainers Dysdercus Sppsupporting

confidence: 91%

Section: Predatorssupporting

confidence: 65%

Section: The Thrips Thrips Palmimentioning

confidence: 87%

Section: The Thrips Thrips Palmimentioning

confidence: 99%

mentioning

confidence: 99%

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Side Effects of Lambda Cyhalothrin and Thiamethoxam on Insect Pests and Natural Enemies Associated with Cotton

Zambrano¹,

Arteaga²,

Velasquez³

et al. 2021

SJA

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Productivity of Cotton in Association with Food Crops in Soil without Nutritional Assistances

Montero-Cedeño¹,

Cañarte²,

Cedeño³

2023

J. Ecol. Eng.

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Intercropped systems have agro-ecological and socioeconomic advantages over monocultures. Cotton is used in systems associated with food crops as an option to increase sustainability in family farming. The objective of this research was to evaluate the productivity of cotton in association with food crops, without using any nutritional assistance in the soil. This study was conducted on the rainy season of 2020 in Manabí-Ecuador. Six treatments were performed: four treatments related with the association of cotton with peanut, cowpea bean, field corn, and sweet corn; and two treatments with cotton monoculture (with and without soil fertilization). Agronomic, productive, and phytosanitary variables were evaluated in 60 m 2 experimental plots. A randomized complete block design with four replications was used. The results determined that cotton yield in the association with peanut was significantly equal to the monoculture with and without fertilization. In the intercropped food crops, there was a reduction in production in relation to the monocultures. However, it was the peanut in association with cotton with the lowest reduction, in addition to presenting the best Land Equivalence Ratio (1.71) and the best Marginal Rate of Return (120.56%), which suggests that this association is a viable alternative and easy to adopt by the small cotton producer.

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Cercospora leaf spot management with nitrogenous fertilizers in cotton is dependent on the disease amount in the plant canopies

Parrales-Rodríguez,

Zambrano-Gavilanes,

Portalanza

et al. 2024

Sci. agropecu.

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The aim of this study was to examine the impact of both organic and inorganic nitrogen fertilizers on the intensity and epidemiological components of Cercospora leaf spot across three different canopies of cotton plants, specifically the variety DP ACALA 90, under field conditions. Fertilizers used in the study included bovine manure, Jatropha curcas seedcake, poultry manure, and urea (the latter serving as a control). These were applied at 20 days after plant emergence and then during the flowering stage until the total nitrogen (N) dose reached 50, 100, 150, or 200 kg N per hectare. The incidence and severity of the disease were assessed starting at the reproductive stage B1 (the first visible flower bud) across the lower, middle, and upper canopies of four cotton plants, with six evaluations conducted over time. To calculate the initial inoculum (Y0) and the disease progress rate (r), the Exponential, Gompertz, and Logistic models were employed based on temporal data. The study was designed as a randomized complete block with a 4x4 factorial arrangement (fertilizer type x dose), and mean comparisons were made using Tukey's test (p ≤ 0.05). It was found that disease intensity within each canopy level varied in response to the type of nitrogen source and the applied dose, with the severity of the disease (including the area under the disease progress curve) being particularly influenced. A significant interaction between the type of fertilizer and the dose regarding the intensity of Cercospora leaf spot was observed. The Exponential model most accurately depicted the disease's temporal progression. Notably, poultry manure and urea were the fertilizers that most adversely influenced the intensity and initial inoculum (Y0) of Cercospora leaf spot across the various canopies of the cotton plants. The findings suggest that the use of organic fertilizers in cotton cultivation could represent a viable sustainable management strategy.

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Generación de tecnologías para incrementar la productividad del algodón Gossypium hirsutum L. en Manabí, Ecuador

Cited by 5 publications

References 7 publications

Side Effects of Lambda Cyhalothrin and Thiamethoxam on Insect Pests and Natural Enemies Associated with Cotton

Side Effects of Lambda Cyhalothrin and Thiamethoxam on Insect Pests and Natural Enemies Associated with Cotton

Productivity of Cotton in Association with Food Crops in Soil without Nutritional Assistances

Cercospora leaf spot management with nitrogenous fertilizers in cotton is dependent on the disease amount in the plant canopies

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