INDUCING RESISTANCE AGAINST LEAF MINER AND OTHER PESTS ATTACKING SOME TOMATO VARIETIES IN EL-MINIA GOVERNORATE
STAFA HUSSEIN AHMEDNEHAL MO;
Abstract
This study focused on induction of tomato plant defense to obtain the resistance against some important economic insect pests in El-Minia governorate. The study includes three objectives; the first, survey of Tuta absoluta in nursery and field during two successive seasons 2011 and 2012. The second, investigate the effects of some elicitors on controlling Tuta absoluta and other major pests as well as yield characteristics of tomato fruits. The third, the studying the effect of the elicitor treatments on enzymes activities (polyphenol oxidase and peroxidase), total phenolic compounds and total flavonoids of tomato plants.
The tested elicitors included synthetic chemicals [salicylic acid (SA), L-ascorbic acid (L-AA) and benzothiodiazol (BTH)] and Biological agent [Effective Microorganism biofertilizer (EM)].
Also, the role of tested natural substances were studied on Tuta absoluta and they included essential oils (Eucalyptus oil, Rue oil, Anise oil and Basil oil), aqueous extracts (Garlic extract and Lemon grass extract).
Seedlings of tomato were treated with elicitor treatments four times; two times before transplanting and two after.
The major results and conclusions from the present study are:
A. Survey of Tuta absoluta in nursery and field:
1- In tomato nursery, number of moths/trap ranged from 7 to 79 moths/trap in the first season. Although the sensitivity of the infestation with T. absoluta was very high in the second season, numbers of moths/trap were decreased in 26th of May to 11th of June.
2- In farmer’s field at Tahnasha village, numbers of moths/trap ranged per Feddan (4200 m2) from 57.5 in 19th of June to 102.5 in 22nd of May in the first season. However, in the second season, moths/trap ranged from 68 in the second of June to 168 moth in the 11th of the same month.
3- In June, numbers of moths/trap were detected in both season.
4- At the Experimental Farm in two seasons, numbers of moths in trap without pheromone were varied in two seasons 2011&2012, except in the period of first July to the middle of August in season 2011, there were ranged from 26 to 51 moths/trap. In traps with pheromone, numbers of moths/trap were increased in ascending order monthly except in the sample of 17/6 in season 2011. While in the second season, numbers of moths/trap were increased gradually until 17th of June, that numbers were 211 moths/trap.
A. Effect of elicitors on infestation with Tuta absoluta and other pests as well as yield and growth characteristics of tomato fruits:
a) Infestation with Tuta absoluta, other pests and their predators
1- L-AA (200 ppm) recorded the lowest percentage of T. absoluta
The tested elicitors included synthetic chemicals [salicylic acid (SA), L-ascorbic acid (L-AA) and benzothiodiazol (BTH)] and Biological agent [Effective Microorganism biofertilizer (EM)].
Also, the role of tested natural substances were studied on Tuta absoluta and they included essential oils (Eucalyptus oil, Rue oil, Anise oil and Basil oil), aqueous extracts (Garlic extract and Lemon grass extract).
Seedlings of tomato were treated with elicitor treatments four times; two times before transplanting and two after.
The major results and conclusions from the present study are:
A. Survey of Tuta absoluta in nursery and field:
1- In tomato nursery, number of moths/trap ranged from 7 to 79 moths/trap in the first season. Although the sensitivity of the infestation with T. absoluta was very high in the second season, numbers of moths/trap were decreased in 26th of May to 11th of June.
2- In farmer’s field at Tahnasha village, numbers of moths/trap ranged per Feddan (4200 m2) from 57.5 in 19th of June to 102.5 in 22nd of May in the first season. However, in the second season, moths/trap ranged from 68 in the second of June to 168 moth in the 11th of the same month.
3- In June, numbers of moths/trap were detected in both season.
4- At the Experimental Farm in two seasons, numbers of moths in trap without pheromone were varied in two seasons 2011&2012, except in the period of first July to the middle of August in season 2011, there were ranged from 26 to 51 moths/trap. In traps with pheromone, numbers of moths/trap were increased in ascending order monthly except in the sample of 17/6 in season 2011. While in the second season, numbers of moths/trap were increased gradually until 17th of June, that numbers were 211 moths/trap.
A. Effect of elicitors on infestation with Tuta absoluta and other pests as well as yield and growth characteristics of tomato fruits:
a) Infestation with Tuta absoluta, other pests and their predators
1- L-AA (200 ppm) recorded the lowest percentage of T. absoluta
Other data
| Title | INDUCING RESISTANCE AGAINST LEAF MINER AND OTHER PESTS ATTACKING SOME TOMATO VARIETIES IN EL-MINIA GOVERNORATE | Other Titles | استحثاث المقاومة ضد صانعة الأنفاق والآفات الأخرى التي تهاجم بعض أصناف الطماطم في محافظة المنيا | Authors | STAFA HUSSEIN AHMEDNEHAL MO | Issue Date | 2014 |
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