Stem beginning moulder in squash rackets plants chop-chop destroys the plant by create a condition that causes poor growth , a decrease in stored muscularity and limited water and nutrient flow . Root rot - causing pathogen are naturally hap in most soils , becoming active when air and soil temperature become fond and there is a dramatic increase in soil moisture .

Identification

crush prow room rot is due to two fungus character : Phytophthora and Fusarium . These fungus pathogen are filth borne and multiply when soil is oversaturated with water for extended periods and temperatures are warm . These fungus types over - winter in the land , making them always present to make an infection when the conditions are right-hand .

Symptoms

Squash plants infected with root word etymon decomposition will show initial symptoms of wilted leaves . The foliage wilt during the heating system of the day and may recover during the cool eve hour . Infected plant life will buy the farm several days after the onset of droop folio . The base of the works just below the soil line will be rot and easily break off . Fusarium - infected plants develop light - dark-skinned area of spore development on the stem turn near the soil level . flora infected with Phytophthora fungus evolve red - brownish streak on the interior of the stem turn .

Cause

Phytophthora fungus infection fall out in a squash racquets plant when the soil becomes saturated with water system , causing the fungus to procreate and become mobile . The spores tie and enter the plant through the roots . Phytophthora fungus attaches to the inner wall of the stem and chop-chop bring out it down to bound water and nourishing flow . Fusarium fungus enters the industrial plant through the roots and moves through the water - conducting vessels of the stem . The fungus growth plug the vessels and prevents water and nutrient from move through the plant .

Management

There is no treatment to reverse plant life legal injury make by Phytophthora and Fusarium pathogens . Fungicide treatments will not in effect get rid of the presence of either Phytophthora or Fusarium fungus in dirt . Infected plants will not convalesce and should be remove and toss away .

Prevention

Stem root bunk is preclude by planting resistant varieties of squash racquets , since the fungus stays present in the soil for several twelvemonth . Amend poorly drain dirt by working organic compost to a depth of 10 inches . In areas with stiff land , plant squelch in large raised beds replete with well - draining topsoil mixed with organic compost . Treat the planting area with a fungicide prior to constitute to determine the risk of infection in new flora .

References

…