Effect of intercropping carrot (Daucus carota L.) with french marigold (Tagetes patula nana L.) and pot marigold (Calendula officinalis L.) on the occurrence of some pests and quality of carrot yield

Abstract

A b s t r a c tIntercropping combines different aspects of the interaction between organisms in ecosystems and may be classified as a pro-ecological method of plant cultivation limiting the harmful human interference in the environment, especially the use of chemicals. It also allows high yield, good quality, and economic productivity to be achieved. The aim of the present study, conducted in the years [2003][2004] in Mydlniki near Kraków, was to determine the effect of intercropping carrot Nardin F 1 with French marigold (Tagetes patula nana L.) 'Kolombina' and pot marigold (Calendula officinalis L.) 'Promyk' on carrot yield, its quality, and the occurrence of pests. On average in both years of the study, intercropping did not reduce total or marketable carrot yield. In 2003 intercropping contributed to a significant increase in marketable yield compared with yield from sole cropping. In 2004 the dry matter content was higher in the roots of carrots grown with pot marigold. The treatments intercropped with both French and pot marigold were characterized by an increased content of sugars in carrot roots and in 2004 year -of carotenoids. Intercropping had a significant effect on the number of roots damaged by the carrot rust fly, Psila rosae, (the best in this respect was the combination with Tagetes) and by nematodes (the best in this respect was the combination with Calendula). The number of larvae of carrot psyllid, Trioza viridula, was significantly lower in the plots where carrot was intercropped. The study did not find intercropping to have a positive effect on reducing the occurrence of the root aphid.

Intercropping of lettuce and onion controls caterpillar thread, Agrotis ípsilon major insect pest of lettuce

“…Several studies on the effect of intercropping in the management of insects have been described in the literature and the results were similar to those found in this work [14][15][16][17][18][19][20][21].…”

Intercropping of African marigold (Tagetes erecta Linnaeus (Asteraceae)) Varieties at Different Plant Density with Tomato (Solanum iycopersicum Linnaeus (Solanaceae)) on Yield Related Traits and Yield of tomato at Wondo Genet, Southern Ethiopia

“…This study agreed with that of Hussain and Bilal (2007) that the highest fruit damaged was from sole cropping of tomato as compared to tomato-marigold intercropping. Similar Jankowska et al (2012) that the highest unmarketable yield of carrot was obtained from sole cropping but the lowest from carrot-marigold intercropping. Because intercropping of marigold with carrot enables to protect insect pests and other soil born nematodes by its flower and root system, respectively.…”

Intercropping Induces Changes in Specific Secondary Metabolite Concentration in Ethiopian Kale (Brassica carinata) and African Nightshade (Solanum scabrum) under Controlled Conditions

“…Both carotenoids and chlorophylls are largely influenced by genetic variation and growing conditions. Previous studies revealed an impact of intercropping on carotenoids as well as chlorophylls in various crops, e.g., amaranth leaves ( Ng’ang’a et al, 2009 ), carrots ( Jankowska et al, 2012 ), Chinese cabbage ( Cai et al, 2011 ) , and Moringa ( Abou-Zeid and Salama, 2014 ). In our study the intercropping did not significantly change the concentration of the photosynthetic pigments, whereas the water supply impacted their concentration.…”