Biological aspects and feeding behavior of cotton aphid in watermelon cultivars submitted to silicon application

Pereira, Rosane Rodrigues da Costa; Barbosa, Roneres Deniz; Ferreira, Luciana Diniz; Silva, Douglas Marcelo Pinheiro da; Zaché, Ronelza Rodrigues da Costa; Pereira, Carlos Eduardo

doi:10.1590/1808-1657000132020

Acessibilidade / Reportar erro

Brasil

Arquivos do Instituto Biológico

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

SCIENTIFIC ARTICLE • Arq. Inst. Biol. 87 • 2020 • https://doi.org/10.1590/1808-1657000132020 copy

Biological aspects and feeding behavior of cotton aphid in watermelon cultivars submitted to silicon application

Aspectos biológicos e comportamento alimentar do pulgão-do-algodoeiro em cultivares de melancia submetidas à aplicação de silício

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This research aimed to evaluate the biological aspects and the feeding behavior of Aphis gossypii in watermelon cultivars submitted to silicon application. The experiment was conducted at the Institute of Education, Agriculture and Environment of the Federal University of Amazonas, Humaitá, Brazil. The experimental design was completely randomized in a 2×3 factorial (with and without silicon; cultivars Crimson Sweet, Fairfax and Charleston), with ten replications. The application of silicic acid (1%) was carried out directly on the substrate using dose equivalent to 1 ton SiO₂·ha^-1, 25 days after sowing. The rearing of aphids was kept in cucumber plants, cultivar Caipira. Insect biology tests were conducted to evaluate the duration of the prereproductive, reproductive and postreproductive periods, longevity, number of nymphs, and feeding behavior using the honeydew secretion technique. Analysis of variance was performed using the statistical program SISVAR and the means were compared by the F and Scott–Knott test (p ≤ 0.05). The silicon application to watermelon plants affects the reproduction and feeding of A. gossypii. The watermelon plants cultivar Crimson Sweet treated with silicon has high resistance to feeding by A. gossypii.

KEYWORDS
silicon acid; aphids; cucurbitaceous; constitutive resistance; Aphis gossypii

SV	DF	Mean Squares
SV	DF	NN	PRE	RP	POS	LON
Silicon	1	6080.267^ Significant at 1% probability level;	0.067^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	117.600^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	0.817^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	112.067^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.
Cultivars	2	674.817^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	0.117^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	17.150^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	1.850^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	17.717^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.
Silicon × cultivars	2	1205.117^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	0.117^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	35.150^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	0.317^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.	48.017^ns ns not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation.
Error	54	581.552	0.063	32.663	0.639	41.174
CV (%)	-	28.16	5.05	25.98	122.97	23.31

Silicon	NN	PRE	RP	POS	LON
Without Si	95.70 ± 3.51a	5.0 ± 0.05a	23.4 ± 0.62a	0.53 ± 0.13a	28.93 ± 0.66a
With Si	75.57 ± 5.30b	4.9 ± 0.05a	20.6 ± 1.33a	0.77 ± 0.16a	26.13 ± 1.50a

SV	DF	Mean squares
SV	DF	NG	TFD	TLD
Silicon	1	10.548^ Significant at 1% probability level;	41.631^ Significant at 1% probability level;	147.320^ Significant at 1% probability level;
Cultivars	2	0.505^ns ns Not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation. NG was transformed into v(X + 0.5).	105.555^ Significant at 1% probability level;	60.749^ Significant at 1% probability level;
Silicon × cultivars	2	0.493^ns ns Not significant; SV: source of variation; DF: degrees of freedom; CV: coefficient of variation. NG was transformed into v(X + 0.5).	75.224^ Significant at 1% probability level;	94.225^ Significant at 1% probability level;
Error	24	0.194	0.376	7.140
CV (%)	-	-	25.12	33.74

Cultivars	Time for the first droplet (hours)
Cultivars	With silicon	Without silicon
Crimson Sweet	0.00 ± 0.00bB^* * There was no feeding by A. gossypii.	0.95 ± 0.42aA
Fairfax	10.54 ± 0.25aA	1.85 ± 0.30aB
Charleston	0.32 ± 0.15bA	1.00 ± 0.31aA
Silicon	Number of droplets
Without silicon	5.40 ± 0.41B
With silicon	1.27 ± 0.50A

Cultivars	Time for honeydew last droplet (hours)
Cultivars	With silicon	Without silicon
Crimson Sweet	0.00 ± 0.00cB^* * There was no feeding by A. gossypii.	10.39 ± 0.63aA
Fairfax	10.93 ± 0.34aA	9.06 ± 1.25aA
Charleston	6.18 ± 2.54bB	10.96 ± 0.23aA

Instituto Biológico Av. Conselheiro Rodrigues Alves, 1252 - Vila Mariana - São Paulo - SP, 04014-002 - São Paulo - SP - Brazil
E-mail: arquivos@biologico.sp.gov.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Corresponding author: rosaneilheus@gmail.com