עכביש סקירה על העכבישים - המכון למצוות התלויות בארץ

דף הבית » עכביש

עכביש

כ' אדר ב' התשע"ט | 27/03/2019

סקירה על העכביש

העכבישים הם סדרה ממחלקת העכבישניים שלהם עשרות אלפי מינים.

למחלקה זו שייכת גם סדרת האקריות.

גוף העכביש עשוי שתי חטיבות ראש-חזה ובטן בלתי פרוקה.

בין הראש-חזה והבטן קיים שנץ שניצב דק מחבר ביניהם.

עכביש בהגדלה

עכביש בהגדלה

ארבעה זוגות רגלי-חזה להליכה יש על פי רוב לעכביש.

כמזיק עיקרי לצמחים נמנית האקרית המצויה.

אמנם מצויים בין עלי הירק כגון בין עלי החסה ועוד, עכבישים בגדלים שונים החל מגודל של 1 מ”מ ומעלה.

קצב ריבויים של העכבישים הוא יחסית גדול מאד.

אמנם להבדיל מן האקרית שאינם יורדים בקלות מן הצמח, העכבישים יורדים בקלות בשטיפה במים או בניעור חזק.

טופס התחברות

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