STUDIES ON SOME INSECT PESTS IN NEWLY RECLAIMED AREAS
EL-SAYED Aly HASSAN SHERIEF;
Abstract
In the Arab Republic of Egypt, many insect pests attack both fmit trees and field crops in newly reclaimed areas. Family Scarabaeidae comprises several. representative species more or less injurious to agriculture. In recent years, the population of "Tropinota suqalida Scop. outbreaked and have caused great damage to various plantations. The following points were taken in consideration as follows:
1- Survey and seasonal fluctuations: Twelve host plants were examined in this work during the flowering perio11, from January until April, 1-3 peaks of flight activity were recorded. The period of flowering and infestation on different hosts lasted about 12 weeks, the longest one were on broad bean, lupine and rocket.
2- Colour and host preference: The broad bean flowers are more preferable followed by wild mustard. The preference of flower colour spectmm was white and yellow, while the preferable colour of pan and funnel of traps was blue.
3- Flight distance and direction ofT. squalida adults. The flight distance of marked and released adults were, 61.4% for 50m.,
36% for 100 m., and 2.6% for 170m.. Females fly to longer
distances than males. Female were more attracted in descending order to western, southern, S /W & Sf E directions.
4- Damage assessment and estimation of injure levels (DTL): Percentage of damage in flowers and mean number of adults/plant per each host. The DTL 22.8% (apple), 27.6%
1- Survey and seasonal fluctuations: Twelve host plants were examined in this work during the flowering perio11, from January until April, 1-3 peaks of flight activity were recorded. The period of flowering and infestation on different hosts lasted about 12 weeks, the longest one were on broad bean, lupine and rocket.
2- Colour and host preference: The broad bean flowers are more preferable followed by wild mustard. The preference of flower colour spectmm was white and yellow, while the preferable colour of pan and funnel of traps was blue.
3- Flight distance and direction ofT. squalida adults. The flight distance of marked and released adults were, 61.4% for 50m.,
36% for 100 m., and 2.6% for 170m.. Females fly to longer
distances than males. Female were more attracted in descending order to western, southern, S /W & Sf E directions.
4- Damage assessment and estimation of injure levels (DTL): Percentage of damage in flowers and mean number of adults/plant per each host. The DTL 22.8% (apple), 27.6%
Other data
| Title | STUDIES ON SOME INSECT PESTS IN NEWLY RECLAIMED AREAS | Other Titles | دراسات على بعض الآفات الحشرية فى المناطق المستصلحة حديثا ً | Authors | EL-SAYED Aly HASSAN SHERIEF | Issue Date | 2001 |
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