Abstract
Currently, plant parasitic nematodes (PPN) especially root knot nematodes, Meloidogyne spp. have been found involved in the global losses of tomato crops. The most employed tactic for managing PPN in Africa is non-fumigant nematicides. Recently, in Egypt abamectin was recorded as a new tool to control PPN. Thus, two pot experiments were conducted to evaluate the potential of abamectin and certain non-fumigant nematicides namely; oxamyl and ethoprophos at two different formulations (granular and liquid) against southern root knot nematode (Meloidogyne incognita) on tomato plants under greenhouse conditions. Results revealed the granular formulations of ethoprophos and oxamyl, in addition to abamectin, showed the same significance (P≤0.05) in suppressing tomato soil population and root galls of M. incognita, during both experiments. However, liquid formulations of ethoprophos and oxamyl gave relatively less decreasing in soil population and root galls. On the other hand, all applied treatments improved plant growth criteria ranging from 36.92 to 126.44% in shoot dry weight and from 31.25 to 137.50% in root dry weight for both experiments.
Highlights
In recent years, plant parasitic nematodes, especially root knot nematodes have been found involved in the global losses of tomato crops (Luc et al, 2005)
The impact of abamectin as well as two different formulations of ethoprophos and oxamyl was investigated against the southern root-knot nematode, M. incognita on tomato plants in two experiments under greenhouse conditions (Table 1)
CONCLUSION we can conclude that abamectin (2% SC) according to our study is successful new nematicide and at par with the granular formulation (10% G) which proved their superiority in suppressing second stage juveniles
Summary
Plant parasitic nematodes, especially root knot nematodes have been found involved in the global losses of tomato crops (Luc et al, 2005). The most employed strategy in Africa and worldwide to control plant parasitic nematodes (PPN) are nonfumigant nematicides The majority of these nematicides are belonging to organophosphate and carbamate groups. Ethoprophos (Mocap®) is belonging to the organophosphate group and work as systemic insecticide and nematicide It could be used as soil application. In the present study, we aimed to evaluate the potential of abamectin as a newly registered nematicide in comparison with different common formulations (granular and liquid) of conventional non-fumigant nematicides namely; ethoprophos and oxamyl against southern root-knot nematode (Meloidogyne incognita) on tomato plants in pot experiments under greenhouse conditions. MATERIALS AND METHODS Nematicides Used: Five nematicides viz., abamectin (Tervigo®2% SC), ethoprophos (Mocap® 10 % G and Nemacap® 20% EC) and oxamyl (Vydate® 10 % G and Fedal® 24% SL) were used in the present study. In the termination of the experiments, the dry weights of shoot and root, the number of galls/root system and the number of J2 / 250 g soil were evaluated
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