Nematicidal Efficacy of Fluensulfone against False Root-knot Nematode (Nacobbus aberrans) in Cucumber Crop under Field Conditions | Chapter 10 | Advances and Trends in Agricultural Sciences Vol. 2

The present study was carried out to compare the efficacy of a nematicide of new generation for the control of the false root-knot nematode; Nacobbus aberrans, in cucumber crop (Cucumis sativus L.) under field conditions. The experiment was set up under a randomized complete block design with four replications. Six treatments were assessed for control of N. aberrans: four doses of fluensulfone, one of the nematicide oxamyl and a control with no application of nematicides. Ten days before transplanting, nematicides were applied in a single application via irrigation systems. Higher control under field conditions was obtained with the application of fluensulfone at a dose of 2.75 L.ha-1. The lowest final population densities of N. aberrans in cucumber crop were recorded in the plots treated with fluensulfone at the dose of 2.25 L.ha-1, with an average of 6.25 juveniles, and the lowest galling index was observed in plots treated with fluensulfone at the same dose, with a galling index of 2.1. The results indicated that application of fluensulfone to cucumber crop can provide good control of N. aberrans.

Author(s) Details

José Alonso Calvo-Araya
Escuela de Ciencias Agrarias, Universidad Nacional de Costa Rica, Apartado 86-3000, Heredia, Costa Rica.

Martha Orozco-Aceves
Instituto Regional de Estudios en Sustancias Tóxicas, Universidad Nacional de Costa Rica, Apartado 86-3000, Heredia, Costa Rica.

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Bio-pesticidal Properties of Neem (Azadirachta indica) | Chapter 03 | Advances and Trends in Agricultural Sciences Vol. 1

Consequence upon the geometrically rising world population and the increasing pressure on food items, it has become increasingly necessary to increase food production from the present level. The possibility of achieving this is not only to increase production but also to protect the crops cultivated. Crop protection can be achieved through several means. One of such is the use of pesticides. This paper therefore reviews the use of neem extracts as bio-pesticides among other plant species with inherent pesticidal activities. It is no doubt that the chemical pesticides or insecticides possess inherent toxic substances that endangers the ecological environment, operators of application equipment, soil microbiota and consumers of the agricultural products. It is therefore important that we encourage the use of biological pesticides as they affect only target pest, are easily biodegradable, increase farm land fertility, environmentally friendly, cost effective and ease of availability. It is also important that because of the low cost of production of bio-pesticides it should be encouraged as an option in African countries especially Nigeria in agricultural practices. The practice of farmers making their own neem-based products for pest control would reduce their dependence on external inputs for agriculture. It would also reduce their cost of pest control to almost zero, leaving only labour as a potential expenditure item. Pests can also be controlled without the use of toxic chemical pesticides, which will reduce the harm posed to humans and the environment alike. There is wide scope for innovation in developing neem as an efficient bio-pesticide. There is enough information to encourage the use of different neem extracts. With the increasing trend of using bio fertilizers, insecticides and pesticides, neem should be increasingly cultivated and grown all over the world to get active ingredient-azadirachtin, responsible for stopping the growth cycle of pests. Neem is also assuming a lot of importance in crop management. Considering the fact that neem is not only a cheaper, naturally occurring product and an effective method to control pests and insects, but also has no side effects on plants or other living beings especially soil micro biota.

Author(s) Details

Dr. Bassey Etta Agbo

Department of Microbiology, University of Calabar, P. M. B. 1115, Calabar, Nigeria.

Dr. (Mrs.) Abo Iso Nta

Department of Zoology and Environmental Biology, University of Calabar, P. M. B. 1115, Calabar, Nigeria.

Mr. Mathias Okang Ajaba

Department of Science Laboratory Technology, University of Calabar, P. M. B. 1115, Calabar, Nigeria.

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