000			02622nam a2200217Ia 4500
008			220216s9999 xx 000 0 und d
100			_aRighi Ciro Abbud et al.
245		0	_aInfluence of rubber trees on leaf-miner damage to coffee plants in an agroforestry system
260			_bAgroforestry Systems _c2013
300			_a1351-1362
500			_aSource Year: 2013
520			_aThe coffee leaf-miner(CLM) (Leucoptera coffeella Guerin-Meneville; Lepidoptera; Lyonetitdae), the main pest of coffee plants, occurs widely throughout the Neotropics where it has a significant, negative economic and quantitative impact on coffee production. This study was conducted in a rubber tree/coffee plants, i.e. from beneath the rubber trees,extending through a range of distances from the edge of the tree plantation to end in a coffee monocrop field. The most severe damage inflicted on coffee plants by the CLM (number of mined leaves) from April, which marks the start of the water deficit period, until Sepetember 2003 was in the zone close to the rubber trees, whereas the damage inflicted on plants in the monocropped field was comparable to that on coffee plants grown directly beneath the rubber trees, which received about 25-40;of the available irradiance (Ir-available irradiation at a certain position divided by the irradiation received in full sunlight, i.e. in the monocrop). From May until July damage caused by the CLM nearly doubled in each month. In midwinter (July), the damage decreased preceptibly from the tree edge toward the open field. From September onward, with the rising airtemperatures CLM damage in the coffee monocrop started to increase. Based on these results, we conclude that coffee plants grown in the full sun incurred the most damage only at the end of winter, with warming air temperatures. Coffee plants grown in shadier locations (25-40;Ir) were less damaged by the CLM, although a higher proporation of their leaves were mined. The rubber trees probably acted as shelter during the cold autumn and winter seasons, leading to greater CLM damage over a distance outside the rubber tree plantation that was about equal to the height of the trees. Future studies should attempt to relate leaf hydric potential to pest attack in field conditions. More rigorous measurements of shade conditions could improve our understanding of the relationship of this factor to CLM attack.
650			_aCoffee pest
650			_aCoffes spp.
650			_aHevea spp.
650			_aLeaf damage
650			_aLeucoptera coffeella
650			_aPopulation dynamics
650			_aShade
942			_cJS
999			_c61308 _d61308