Antifungal effect of the cumulative application of biostimulant and fertilizers on young cocoa fruits rot at Tafissou site, Centre-East of Côte d'Ivoire

The use of biostimulants as an alternative way to chemical, often toxic, remains one of the best approaches to control cocoa black pod disease caused by Phytophthora spp. This study has been carried out to evaluate the effect of biostimulant’s applications number and the cumulative action in case of applying previously fertilizers. The experimental design consisted of a Fischer block with six treatments (T01, T02, T1, T2, T3 and T4) and repeated three times. This design was replicated on two sites, one with previous fertilizer (DAE) and the other without previous fertilizer (DSE). Observations were made monthly on each test tree. The biostimulant Banzai was applied for 3 or 4 consecutive months depending on the treatment at each site. The data collected included the total number of cherelles produced and the number of rotten cherelles. From these, data were deduced the rates of healthy cherelles on which the Kruskal-Wallis test was applied to compare treatments between them and between sites. The results showed that four applications of the biostimulant with fertilizer provided better control than three applications without fertilizer. The results also showed that the majority of treatments at the DAE site were more effective than treatments at the DSE site. In conclusion, four applications Banzai coupled with fertilizer have achieved the best rates of healthy cherelles whatever the site. Regarding the cumulative effect of the previous fertilizer with Banzai, treatments of the site with the previous fertilizer were still better than the treatment site without fertilizer

Efficiency of Banzai Biostimulant on the cherries production in healthy and cocoa trees affected by swollen shoot virus: A case study at Petit-Bondoukou Côte d'Ivoire

The present study is to evaluate the efficiency of the Biostimulant "Banzai" on the production of cherries from healthy anddiseased trees in a context of pressure from Swollen shoot cocoa disease in Petit-Bondoukou in the department of Soubré. Thespecific aim is to compare the effect of the single and double doses of Banzai on the production of cherries from healthy anddiseased trees. The experimental design consists of a single block of four plots marked T0 (Control), T1 (a standard rate Banzaiapplication without fertilizer), T2 (a double rate Banzai application without fertilizer) and T3 (a standard rate Banzai applicationwith fertilizer). Each plot contains ten healthy trees and ten trees with swollen shoot disease. This device was repeated four timesat the study site. Banzai was applied for four months and observations were made for six consecutive months on the number ofcherries produced. The results of the Kruskal-Wallis test showed that the treated plots produced significantly more cherries thanthe control plots in both healthy and diseased trees at any dose. In addition, in healthy trees, the Kruskal-Wallis test showed thatthe single dose of Banzai without fertilizer (T1) significantly produced more cherries than other treatments. While in diseasedtrees, the Kruskal-Wallis test showed that the double dose of Banzai without fertilizer (T2) significantly produced more cherriesthan other treatments