National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The effect of different biological and chemical nematicide cycles per year or their alternation was compared on banana (Musa AAA cv. Williams) root weight, root nematode control and crop yield in a commercial banana plantation in Ecuador testing 11 treatments in a randomized complete block design with five replicates. Treatments consisted of the rotation of two or three chemicals or even the rotation of four biological nematicide cycles by year or the rotation of chemical and biological nematicides in the year plus the untreated control. Averaging the 24 root nematode samplings, the rotation of two and three chemical nematicide cycles by year reduced R. similis (P= 0.0347) by 25 and 23%, Helicotylenchus spp. (P= 0.0009) by 31 and 18% and total nematodes (P= 0.0074) by 28 and 21%, respectively. The rotation of four biological nematicide cycles by year drops R. similis between 10 and 28%, Helicotylenchus spp. between 5 and 21% and total nematode between 5 and 23%. Although there is substantial, positive literature on nematode control with biological products, for us is the first time that some reduction was observed. Given the COVID-19 pandemic, it was not possible to do successive harvests, but at the final harvest, from 23 to 25 months after first treatment application, a difference in yield (P< 0.0001) was observed. The highest number of boxes per hectare per year was found in the treatment with 4 cycles by year of SeaMaxx® + Cronox® with 4149 followed closely by two chemical nematicides cycles by year with 4122 boxes of 18.14 kg. The additional net income in the treatments that increased yield, deducted the cost of packing for each additional box and the treatment cost was between US $327 and $3420 ha-1 year-1 24 months after the first treatment was applied. However, the net profit for every dollar invested in nematode control was higher with two chemical nematicides with $20.2 compared to $6.9 returned for the four cycles of SeaMaxx® + Cronox® due to frequent of application and higher treatment cost.
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