Pest damage on Jatropha curcas (Euphorbiaceae): The effect of seedling irrigation in Sahelian Niger

Thunes Karl H., Ratnadass Alain, Nikiema Albert, Claude Zaratou. 2016. Pest damage on Jatropha curcas (Euphorbiaceae): The effect of seedling irrigation in Sahelian Niger. International Journal of Tropical Insect Science, 36 (3) : 140-145.

https://doi.org/10.1017/S1742758416000084

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q4, Sujet : ENTOMOLOGY

Résumé : Herbivory by insects and mites on physic nut (Jatropha curcas L.) seedlings was investigated and compared with irrigation in the semi-arid Sahelian Niger, utilizing a randomized complete block design experiment. Three water treatment protocols were applied and the types of damage were recorded. Less than 5% of the seedlings died during the 10-month trial period with sap suckers causing the most damage on the surviving plants. Plants with high production of biomass and leaf cover (foliage) were most strongly positively correlated with irrigation and were also the plants that endured the highest degree of herbivory. The low dieback may indicate that defence mechanisms counteract seedling herbivory and that drought-stressed plants invest more in their defence mechanism system than vital plants.

Mots-clés Agrovoc : Jatropha curcas, plant, ravageur des plantes, irrigation

Mots-clés géographiques Agrovoc : Niger, Sahel

Mots-clés libres : Physic nut, Sap sucking, Defoliation, Leaf mining

Classification Agris : H10 - Ravageurs des plantes
F06 - Irrigation

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

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